@article{01044056,
title = {Some inequalities for immersed surfaces.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {54},
year = {1997},
pages = {139-145},
zbl = {0880.53051},
language = {en},
url = {http://dml.mathdoc.fr/item/01044056}
}
Marenich, V.; Guadalupe, I.V. Some inequalities for immersed surfaces.. Portugaliae Mathematica. Nova Série, Tome 54 (1997) pp. 139-145. http://gdmltest.u-ga.fr/item/01044056/