@article{10_4153_CJM_1994_001_7,
     author = {Gr\"atzer, G. and Lakser, H.},
     title = {Homomorphisms of {Distributive} {Lattices} as {Restrictions} of {Congruences.} {II.} {Planarity} and {Automorphisms}},
     journal = {Canadian journal of mathematics},
     pages = {3--54},
     year = {1994},
     volume = {46},
     number = {1},
     doi = {10.4153/CJM-1994-001-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1994-001-7/}
}