@article{MAN_1985__270_182945,
     author = {Eugen Popa},
     title = {Finely {Open} {Morphisms} of {H-Cones.}},
     journal = {Mathematische Annalen},
     pages = {83--86},
     publisher = {mathdoc},
     volume = {270},
     year = {1985},
     zbl = {0535.31005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1985__270_182945/}
}