@article{10_4153_CMB_1975_050_0,
     author = {R\"uttimann, G. T.},
     title = {Decomposition of {Projections} on {Orthomodular} {Lattices(1)}},
     journal = {Canadian mathematical bulletin},
     pages = {263--267},
     year = {1975},
     volume = {18},
     number = {2},
     doi = {10.4153/CMB-1975-050-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-050-0/}
}