@article{PM_1997_1997_1_a16,
     author = {Oyma, Knut},
     title = {Envolvente convexa cerrada de los productos de {Blaschke} de interpolaci\'on.},
     journal = {Publicacions matem\`atiques},
     pages = {659-669},
     year = {1997},
     volume = {41},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1997_1997_1_a16/}
}