Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1980_10_Nonea_15, author = {Petrovi\'c Vojislav}, title = {Product-conformal and product-concircular~ courvature tensors}, journal = {Novi Sad Journal of Mathematics}, pages = {137-143}, publisher = {mathdoc}, volume = {10}, year = {1980}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_15/} }
Petrović Vojislav. Product-conformal and product-concircular courvature tensors. Novi Sad Journal of Mathematics, Tome 10 (1980). http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_15/