[1] May, R.M. (1976) Simple Mathematical Models with Very Complicated Dynamics. Nature, 261, 459-467.
http://dx.doi.org/10.1038/261459a0
[2] Connor, J.W. and Wilson, H.R. (2000) A Review of Theories of the L-H Transition. Plasma Physics and Controlled Fusion, 42, R1.
http://dx.doi.org/10.1088/0741-3335/42/1/201
[3] Xia, Z. (1992) The Existence of Noncollision Singularities in Newtonian Systems. Annals of Mathematics, 135, 411-468.
http://dx.doi.org/10.2307/2946572