books.google.com - Elements of Mathematical Ecology provides an introduction to classical and modern mathematical models, methods, and issues in population ecology. The first part of the book is devoted to simple, unstructured population models that ignore much of the variability found in natural populations for the sake...http://books.google.com/books/about/Elements_of_Mathematical_Ecology.html?id=7_IRlnNON7oC&q=transcritical+bifurcation&utm_source=gb-gplus-shareElements of Mathematical Ecology