@article{00940751,
title = {Shape groups for },
journal = {Mathematica Pannonica},
volume = {7},
year = {1996},
pages = {233-252},
zbl = {0858.46049},
language = {en},
url = {http://dml.mathdoc.fr/item/00940751}
}
Čerin, Zvonko. Shape groups for . Mathematica Pannonica, Tome 7 (1996) pp. 233-252. http://gdmltest.u-ga.fr/item/00940751/