%0 Journal Article
%A Petrović Vojislav
%T Product-conformal and 

 product-concircular  courvature tensors
%J Novi Sad Journal of Mathematics
%D 1980
%P 137-143
%V 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_15/
%F NSJOM_1980_10_Nonea_15