1. L.V. Ahlfors, Complex Analysis, 3rd edn. (McGraw-Hill Book, New York, 1978)
2. Á. Álvarez-Parrilla, J. Muciño Raymundo, Dynamics of singular complex analytic vector fields with essential singularities I. Conform. Geom. Dyn. 21, 126–224 (2017)
3. A. Artigue, Órbitas periódicas en billares triangulares. Miscelánea Mat. 59, 19–40 (2014)
4. C. Briot, J.-C. Bouquet, Recherches sur les fonctions doublement périodiques. C. R. Hebdomadaires des Scéances de l’Académie des Sciences 40(7), 342–344 (1855)
5. G. Cairns, R.W. Sharpe, On the inversive differential geometry of plane curves. Enseign. Math. (2) 36(1–2), 175–196 (1990)