@article{1206136783, author = {Nasu, Toshio}, title = {On conformal invariants of higher order}, journal = {Hiroshima Math. J.}, volume = {5}, number = {3}, year = {1975}, pages = { 43-60}, language = {en}, url = {http://dml.mathdoc.fr/item/1206136783} }
Nasu, Toshio. On conformal invariants of higher order. Hiroshima Math. J., Tome 5 (1975) no. 3, pp. 43-60. http://gdmltest.u-ga.fr/item/1206136783/