@article{PIM2_1980__28(42)_116808, author = {Lazov, Petar R. and Piperevski, Boro M.}, title = {On a certain result of {J.} {D.} {Keckic.}}, journal = {Publications de l 'Institut Math\'ematique. Nouvelle S\'erie}, pages = {125}, publisher = {mathdoc}, volume = {28(42)}, year = {1980}, zbl = {0517.34031}, language = {en}, url = {https://geodesic-test.mathdoc.fr/item/PIM2_1980__28(42)_116808/} }