@article{JRAM_1979__0307_0308_152112,
     author = {P.K. Kamthan and Manjul Gupta},
     title = {Several notions of absolute bases.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {160--165},
     publisher = {mathdoc},
     volume = {0307_0308},
     year = {1979},
     zbl = {0395.46009},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__0307_0308_152112/}
}