@article{10_1017_S0017089500008193,
     author = {Koubek, V\'aclav},
     title = {Homomorphisms of (0, 1)-lattices with a given sublattice and quotient},
     journal = {Glasgow mathematical journal},
     pages = {159--170},
     year = {1991},
     volume = {33},
     number = {2},
     doi = {10.1017/S0017089500008193},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008193/}
}