@article{10_21136_CMJ_1987_102132,
     author = {Vrancken-Mawet, L. and Hansoul, Georges},
     title = {The subalgebra lattice of a {Heyting} algebra},
     journal = {Czechoslovak Mathematical Journal},
     pages = {34--41},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1987},
     doi = {10.21136/CMJ.1987.102132},
     mrnumber = {875125},
     zbl = {0625.06004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1987.102132/}
}