___

• Akhiyeser, N. I., Theory of Approximation, (1965), M. pp 1-408; Dover Publications, New York.
• Chebyshev, P. L., “The theory of mechanisms known under the name of parallelograms”, Complete Collected Works, Vol 2, M2, M.-4, (1947).
• ·Ibragimov, I. I., Teoriya Priblijeniya Tsel{mi Funktsiyami, 1979, Baku, ·Izd. “ELM” NAN Azerbaijan Republic, 1–468, (In Russian).
• Khavinson, S.Ya., On an Extremal Problems of the Theory of Analytic Function, Usp Math. Nauk, V4, N4, Moscow, (1949), 158–159.
• Khavinson, S.Ya & Çatskaya, Ye, ¸S., Dvoystvenniye Sootno¸seniya i Kriterii Elementov Nailuç¸sego Priblijeniya, M ·IS·I, Moscow, (1976), (In Russian).
• Nasibov, F. G., Annulyator Klassa W;zu Nekotor{ye Primeneniya, V·IN·IT·I, No 1671-82, Dep. (1982), 1-11, Moscow, (In Russian).
• Nasibov, F. G., Description of Annihilator of one Class of Entire Functions of Finite Semi- Order and Some Applications, ·Izv. VUZ SSSR, MATEMAT·IKA, V. 30, N 2, (1986), 29–33. [8] Nasibov, F. G., Extremal Problems in Classes of Entire Functions Bounded on the Real Axis, ·Izv. VUZ SSSR, V44, N10, (2000), 45–52, Allerton Press, New York.
• Nasibov, F. G., K Extremaln{m Problemam v Klassakh Tsel{kh Funktsiy, Dokl. NAN Azer- baijan Republic, V62, N5–6, (2006), 26–32, (In Russian).
• Nasibov, F. G., Extremaln{ye Zadachi v Klassakh Tsel{kh Funktsiy, , ·Izd. “ELM” NAN Azerbaijan Republic, (1998), 1–298, Baku, (In Russian).
• Natanson, I. P., Konstruktivnaya Teoriya Funktsiy, 1949, Moskova, 1-688. (In Russian)
• Timan, A. F., Teoriya Priblijeniya Funktsiy Deystvitelnogo Peremenogo, 1960, Moscow, (In Russian). (Theory of Approximation of Functions of a Real Variable, Dover Publ., INC, New York, 1963).
• Zinger, I., Best Approximation in Normed Linear Spaces by Elements of Linear Subspaces, 1970, Berlin, Springer.
• Current address : Ferhad HÜSEYÍNO ¼GLU NASÍBOV: Kastamonu University, Faculty of Arts and Science, Dept. of Physics, Kastamonu, TURKEY., Ahmet KAÇAR: Kastamonu University, Education Faculty, Elementary Education Department, Kastamonu, TURKEY
• E-mail address : fnasibov@kastamonu.edu.tr, akacar@kastamonu.edu.tr