@article{GDZPPN002236826,
title = {On the number of triple points of an immersed surface with boundary.},
journal = {Manuscripta mathematica},
volume = {86},
year = {1995},
pages = {285-294},
zbl = {0856.57028},
url = {http://dml.mathdoc.fr/item/GDZPPN002236826}
}
Szücs, A.; Csikós, B. On the number of triple points of an immersed surface with boundary.. Manuscripta mathematica, Tome 86 (1995) pp. 285-294. http://gdmltest.u-ga.fr/item/GDZPPN002236826/