@article{GDZPPN002348861, title = {Classification and Deformation of Riemannian Spaces.}, journal = {Mathematica Scandinavica}, volume = {20}, year = {1967}, pages = {193-208}, zbl = {0182.10601}, url = {http://dml.mathdoc.fr/item/GDZPPN002348861} }
Nakai, Mitsuru; Sario, Leo. Classification and Deformation of Riemannian Spaces.. Mathematica Scandinavica, Tome 20 (1967) pp. 193-208. http://gdmltest.u-ga.fr/item/GDZPPN002348861/