@article{GDZPPN002424088, title = {Convolutions of Vector Fields-I.}, journal = {Mathematische Zeitschrift}, volume = {174}, year = {1980}, pages = {63-80}, zbl = {0442.43015}, url = {http://dml.mathdoc.fr/item/GDZPPN002424088} }
Rao, M.M. Convolutions of Vector Fields-I.. Mathematische Zeitschrift, Tome 174 (1980) pp. 63-80. http://gdmltest.u-ga.fr/item/GDZPPN002424088/