@article{RCM_2006_40_2_a0,
     author = {Francisco Javier Gonz\'alez--Acu\~na Universidad Nacional Aut\'onoma de Mexico and M\'exico ficomx@yahoo.com.},
     title = {On the homeotopy group of the non orientable surface of genus three},
     journal = {Revista colombiana de matematicas},
     pages = {75--79},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/RCM_2006_40_2_a0/}
}