@article{05054223,
title = {Some properties of },
journal = {Divulgaciones Matem\'aticas},
volume = {12},
year = {2004},
pages = {161-169},
zbl = {1099.54501},
language = {en},
url = {http://dml.mathdoc.fr/item/05054223}
}
Caldas, M.; Jafari, S.; Kovár, M.M. Some properties of . Divulgaciones Matemáticas, Tome 12 (2004) pp. 161-169. http://gdmltest.u-ga.fr/item/05054223/