@article{02128950, title = {Some properties of }, journal = {Novi Sad Journal of Mathematics}, volume = {33}, year = {2003}, pages = {129-132}, zbl = {1054.51015}, language = {en}, url = {http://dml.mathdoc.fr/item/02128950} }
Janić, Milan. Some properties of . Novi Sad Journal of Mathematics, Tome 33 (2003) pp. 129-132. http://gdmltest.u-ga.fr/item/02128950/