@article{1102978253, author = {Johnson, H. H.}, title = {Determination of hyperbolicity by partial prolongations.}, journal = {Pacific J. Math.}, volume = {31}, number = {3}, year = {1969}, pages = { 679-695}, language = {en}, url = {http://dml.mathdoc.fr/item/1102978253} }
Johnson, H. H. Determination of hyperbolicity by partial prolongations.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 679-695. http://gdmltest.u-ga.fr/item/1102978253/