@article{10_4064_cm_14_1_135_162,
     author = {J\'ozef S{\l}omi\'nski},
     title = {A theory of {P-homomorphisms}},
     journal = {Colloquium Mathematicum},
     pages = {135--162},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {1966},
     doi = {10.4064/cm-14-1-135-162},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-14-1-135-162/}
}