@article{04132633, title = {On first-order differential operators with Bohr-Neugebauer type property.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {12}, year = {1989}, pages = {473-476}, doi = {10.1155/S0161171289000608}, zbl = {0692.34063}, language = {en}, url = {http://dml.mathdoc.fr/item/04132633} }
Rao, Aribindi Satyanarayan. On first-order differential operators with Bohr-Neugebauer type property.. International Journal of Mathematics and Mathematical Sciences, Tome 12 (1989) pp. 473-476. doi : 10.1155/S0161171289000608. http://gdmltest.u-ga.fr/item/04132633/