@article{PM_2003_2003_1_a13,
     author = {Mello, Luis Fernando},
     title = {L{\'\i}neas direccionalmente curvas medias en superficies inmersas en {R4.}},
     journal = {Publicacions matem\`atiques},
     pages = {415-440},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2003_2003_1_a13/}
}