@article{AUCMP_1997__38_2_a1,
     author = {Grzaslewicz, R.},
     title = {Vertices in ${\Cal L}(H)$},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {5--11},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1997},
     mrnumber = {1614023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1997__38_2_a1/}
}