@article{CMJ_2009__59_1_a12,
     author = {Jakub{\'\i}k, J\'an},
     title = {Projectability and weak homogeneity of pseudo effect algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {183--196},
     publisher = {mathdoc},
     volume = {59},
     number = {1},
     year = {2009},
     mrnumber = {2486624},
     zbl = {1224.06020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009__59_1_a12/}
}