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• Adimoelja, A., Adaikan, P.G., 19 Protodioscin from herbal plant Tribulus terrestris L. improves the male sexual functions, probably via DHEA. Int. J. Impotence Res., 1-15. Arsyad, K.M., 1996. Effect of protodioscin on the quantity and quality of sperms from males with Medica, 22: 614–618. Beideman, oligozoospermia. I., 19 Technique of phenological observations in geobotanical researh.
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• (Cenchrus longispinus) and Puncture vine (Tribulus terrestris). Weed Science, 38: 1621.
• Dinchev, D., Evstatieva, L., Platikanov, S., Galambosi, B., 2010. Investigation of perspective origins of Tribulus terrestris L. for cultivation. Compt. Rend. Acad. Bulg. Sci., 63(10): 1429-1434.
• Dinchev, D., Janda, B., Evstatieva, L., Oleszek, W., Aslani, M. R., Kostova, I., 2008. Distribution of steroidal saponins in Tribulus terrestris from Phytochemistry, 69(1): 176-86. regions.
• Ernst, W.H., Tolsma D.J., 1988. Dormancy and germination of semi-arid annual plan species, Tragus berteronianus and Tribulus terrestris. Flora, 181(3/4): 243-251.
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• Bulgaria. Medical plant specialist grup. Medicinal Plant Conservation, p. 24-28. Fukuda, Y., 1974. Morphological and anatomical studies in T. terrestris L. phyllotaxis and brancing. Bot. Mag. Tokyo, 87: 51-60.
• Ganzera, M., Bedir, E., Khan, I.A., 2001.
• Determination of steroidal saponins in Tribulus terrestris by reversed-phase high- performance liquid chromatography and evaporative light scattering detection. J. Pharm. Sci., 90: 1752-1758.
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• In: Meine, C. (Ed.): Conservation Status and Needs Assessment. pp. 526-561. long-term Koleva, Е., Peneva, R., 1990. Climatic Reference
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• Bulgaria. Farkom. (BUL). Geography of Kostova, I., Dinchev, D., 2005. Saponins in Tribulus terrestris-chemistry Phytochemistry, 4: 111–137. bioactivity.
• Kostova, I., Dinchev, D., Rentsch, G.H., Dimitrov, V., Ivanova, A., 2002. Two new sulfated furostanol saponins from Tribulus terrestris. Z. Naturforsch, 57: 33-38.
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• Physiological and pharmaceutical effects of Tribulus Terrestris as a Multipurpose and Valuable Medicinal Plant. International Journal of Biomedical Research, Vol. 1 (5): 556-562. Biological and Nikolova, А., 2010. Study of germination of Tribulus terrestris L. Scientific Works Agricultural
• University of Plovdiv. LV(1): 217-224.(BUL) Nuhimovskiy, Е.L., Shreoter, Biomorfogeniya Tribulus terrestris. Byuletin Ch. Botanical Garden., Moscow. 111: 53-59. (RUS) I.А., 19 Pandey, R., Sainis, K., 2007. Tribulus terrestris Fruit
• Extract Protects Against Oxidative Stress- Induced Apoptosis. Pharmaceutical Biology, 45(8): 619-625. Schultz, G., 1966. Methods of phenological observations in botanical studies. Nauka, Leningrad. (RUS).
• Semerdjieva, I. 2013. Biological and Phytochemical
• Investigation of Tribulus terrestris L. in Thracian Floristic Region. PhD dissertation, BAS, Sofia. Table Distribution of Tribulus terrestris in sub-regions Karlovo valley. Lokality GPS Coordinats N/E N 58590 E 86690 N 55738 E 87640 N 54170 E 82420 Slope in ° Soil type village Marino pole-LH 21 vilage Vedrare-LH 21 6
• Leached-maroon (Chromic luvisols / FAO) Alluvial-meadow (Fluvisols/FAO) Alluvial-meadow (Fluvisols/FAO) Table Distribution of Tribulus terrestris in sub-regions Stara Zagora field Lokality GPS Coordinats N/E N 40850 E 61460 N 20708 E 34337 Slope in ° Soil type Stara Zagora-LG 89 5 Humus-carbonizing (Renzinas/FAO) Humus-carbonizing (Renzinas/FAO)
• Table Distribution of Tribulus terrestris in sub-regions Haskovo field Lokality GPS Coordinats N/E height Soil type City Simeonovgrad-MG 05 N 13630 E 58690 5
• Smolnik and Alluvial – maroon (Pellic vertisols, Fluvisols /FAO) Leached-maroon( Chromic luvisols /FAO) E 84080 7
• South of the city Harmanli- MG 04 N 92670 E 68760 6 Leached-maroon(
• Chromic luvisols /FAO) Village Bulgarian-MG 09 N 92587 E 92319 5 Leached-maroon(
• Chromic luvisols /FAO) Village G.Dobrevo-MG 23 N 98291 E 01205 5 Alluvial-meadow ( Fluvisols /FAO)
• Village Raikova mogila-MG 42 E 11570 5 Alluvial-meadow ( Fluvisols /FAO) City Svilengrad-MG 32 N 76991 E 13012 5 Alluvial-meadow ( Fluvisols /FAO)
• Table Distribution of Tribulus terrestris in sub-regions Plovdiv and Pazardzhik field Lokality GPS Coordinats N/E Sea level height Slope in ° Soil type Village Zlokuchene - KG67 E 24,17030 N42,21980 N 42,33300 E 24,40160 N 42,27730 E 24,38850 N 42,15890 E 24,14423 N 42,16240 E 24,32160 N 42,21083 E 24,32863 N 2606 E 2490980 N 42,15420 E 24,55110 N 42,13750 E 24,94080 220 5
• Leached maroon (Chromic Luvisols/ Fao) Fig. Dynamics of average daily average temperatures and rainfalls in the Thracian Lowland Floristic Region of Bulgaria. Turkish Journal of Agricultural and Natural Sciences Special Issue: 1, 2014 654 ♦♦ ♦♦ ♦♦ ♦♦ ▲ ▲ ▲ ▲ ▲ ▲ ●● ●● ●● ●● ●● ●● ●● ●● ●● ●● ●● ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦♦ ♦
• V, ≡≡≡≡≡≡ B. ▒▒▒ F, 1. ●●● FS, 1. ▲▲▲ PD, 1. ♦♦♦ V, ≡≡≡≡≡≡ F, 2. ●●● V, ≡≡≡≡≡≡ FS, 3.▲▲▲ V, ≡≡≡≡≡≡ Vegetation Buttoning Flowering .. Fruit-setting .... Plant dying