Detecting communities of animal trade based on Google's PageRank - Grisi Filho, José Henrique Hildebrand; Amaku, Marcos; Ferreira, Fernando; Dias, Ricardo Augusto; Telles, Evelise Oliveira; Ferreira Neto, José Soares; Negreiros, R. L (International Symposium on Veterinary Epidemiology and Economics, 2012)