@article{GDZPPN00206507X, title = {Two types of birational models.}, journal = {Commentarii mathematici Helvetici}, volume = {58}, year = {1983}, pages = {388-415}, zbl = {0526.14035}, url = {http://dml.mathdoc.fr/item/GDZPPN00206507X} }
Brodmann, Markus. Two types of birational models.. Commentarii mathematici Helvetici, Tome 58 (1983) pp. 388-415. http://gdmltest.u-ga.fr/item/GDZPPN00206507X/