@article{1181073045, author = {Freedman, H.I.}, title = {G. J. Butler's research in mathematical biology}, journal = {Rocky Mountain J. Math.}, volume = {20}, number = {4}, year = {1990}, pages = { 839-845}, language = {en}, url = {http://dml.mathdoc.fr/item/1181073045} }
Freedman, H.I. G. J. Butler's research in mathematical biology. Rocky Mountain J. Math., Tome 20 (1990) no. 4, pp. 839-845. http://gdmltest.u-ga.fr/item/1181073045/