@article{10_1017_S0017089500008739,
     author = {\v{S}ev\v{c}ovi\v{c}, Daniel},
     title = {Bounded endomorphisms of free {P-algebras}},
     journal = {Glasgow mathematical journal},
     pages = {209--214},
     year = {1992},
     volume = {34},
     number = {2},
     doi = {10.1017/S0017089500008739},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008739/}
}