1. W. Aziz and C. Christopher, Local integrability and linearizability of three–dimensional Lotka-Volterra systems, Appl. Math. and Comput. 219 (2012), 4067–4081.
2. G. Blé, V. Castellanos, J. Llibre and I. Quilatán, Integrability and global dynamics of the May–Leonard model, Nonlinear Analysis: Real World Applications 14 (2013), 280–293.
3. J. Chavarriga and J. Llibre, Invariant algebraic curves and rational first integrals for planar polynomial vector fields, J. Differential Equations 169 (2001), 1–16.
4. Chiai-Wei Chi, Sze-Bi Hsu and Lin-Ing Wu, On the asymmetric May–Leonard model of three competing species, SIAM J. Appl. Math. 58 (1998), 221–226.
5. A. Clebsch, Ueber die Integration der hydrodynamischen Gleichungen, Journal für die Reine und Angewandte Mathematik 56 (1859), 1–10.