@article{GDZPPN002106116, title = {The angle criterion.}, journal = {Inventiones mathematicae}, volume = {96}, year = {1989}, pages = {437-446}, zbl = {0662.49018}, url = {http://dml.mathdoc.fr/item/GDZPPN002106116} }
Lawlor, Gary. The angle criterion.. Inventiones mathematicae, Tome 96 (1989) pp. 437-446. http://gdmltest.u-ga.fr/item/GDZPPN002106116/