@article{GDZPPN002305550, title = {Geometry of Manifolds which Admit Conservation Laws, II.}, journal = {Mathematische Annalen}, volume = {193}, year = {1971}, pages = {167-179}, zbl = {0209.53303}, url = {http://dml.mathdoc.fr/item/GDZPPN002305550} }
BLAIR, D.E.; STONE, A.,P. Geometry of Manifolds which Admit Conservation Laws, II.. Mathematische Annalen, Tome 193 (1971) pp. 167-179. http://gdmltest.u-ga.fr/item/GDZPPN002305550/