@article{MASLO_2004_54_2_a1,
     author = {Pt\'ak, Pavel and Weber, Hans},
     title = {Order properties of splitting subspaces in an inner product space},
     journal = {Mathematica slovaca},
     pages = {119--126},
     year = {2004},
     volume = {54},
     number = {2},
     mrnumber = {2074209},
     zbl = {1065.03048},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2004_54_2_a1/}
}