___

• Algaba, A., Freire, E., & Gamero, E. (1999). Hypernormal forms for equilibria of vector fields. Codimension one linear degeneracies. Rocky Mountain Journal of Mathematics, 29, 13-45.
• Baggio, R. (2008). Symptoms of complexity in a tourism system. Tourism Analysis, 13(1), 1-20.
• Bella, G., & Mattana, P. (2014). Global indeterminacy of the equilibrium in the Chamley model of endogenous growth in the vicinity of a Bogdanov-Takens bifurcation. Mathematical Social Sciences, 71, 69-79.
• Benhabib, J., Schmitt-Grohé, S., & Uribe, M. (2001). The perils of Taylor rules. Journal of Economic Theory, 96, 40-69.
• Bornhorst, T., Ritchie, J., & Sheehan, L. (2010). Determinants of Tourism Success for DMOs & destinations: An Empirical Examination of Stakeholders' Perspectives. Tourism Management, 31, 572-589.
• Brau, R., Lanza, A., & Pigliaru, F. (2007). How fast are small tourism countries growing? Evidence from the data for 1980-2003. Tourism Economics, 13(4), 603-613.
• Brida, J. G., Sanchez Carrera, E. J., & Risso, W. A. (2008). Tourism's Impact on Long-Run Mexican Economic Growth. Economics Bulletin, 3(21), 1-8.
• Butler, R. (1980). The concept of a tourist area cycle of evolution. Canadian Geographer, 24, 5-12.
• Cole, S. (2009). A logistic tourism model: Resort Cycles, Globalization and Chaos. Annals of Tourism Research, 36(4), 689-714.
• Finco, M. V. A. (2009). Poverty-Environment Trap: A non linear probit model applied to rural areas in the North of Brazil. American-Eurasian J. Agric. & Environ. Sci., 5(4), 533-539.
• Gamero, E., Freire, E., & Ponce, E. (1991). Normal forms for planar systems with nilpotent linear part. In R. Seydel, F. W. Schneider, T. Küpper, & H. Troger (Eds.), Bifurcation and Chaos: Analysis,
• Algorithms, Applications. International Series of Numerical Mathematics, (pp. 123-12). Basel, Birkhäuser.
• Katircioglu, S. T. (2009). Testing the tourism-led growth hypothesis: The case of Malta. Acta Oeconomica, 59(3), 331-343.
• Mattana, P., & Venturi, B. (1999). Existence and stability of periodic solutions in the dynamics of endogenous growth. International Review of Economics and Business, 46, 259-284.
• Musu, I. (1995). Transitional Dynamics to Optimal Sustainable Growth. FEEM Working Paper 50.95.
• Nowak, J. J., Sahli, M., & Cortés-Jiménez, I. (2007). Tourism, capital good imports and economic growth: theory and evidence for Spain. Tourism Economics, 13(4), 515-536.
• Rosendahl, K. E. (1996). Does improved environmental policy enhance economic growth?. Environmental and Resource Economics, 9, 341-364.
• Sachs, J. D., & Warner, A. M. (2001). Natural resources and economic development: The curse of natural resources. European Economic Review, 45, 827-838.
• Schubert, F. S., Brida, J. G., & Risso, W. A. (2010). The impacts of international Tourism demand on economic growth of small economies dependent of tourism. Tourism Management, 32(2), 377-385.
• Shang, D., & Han, M. (2005). The existence of homoclinic orbits to saddle-focus. Applied Mathematics and Computation, 163, 621-631.
• Shilnikov, L. P. (1965). A case of the existence of a denumerate set of periodic motions. Sov. Math. Docl., 6, 163-166.