[1] GRÄTZER G.:
General Lattice Theory. Math. Reihe, Birkhäuser Verlag Basel und Stuttgart (1978).
MR 0504338
[2] HANSOUL G., VRANCKEN-MAWET L.:
The subalgebra lattice of a Heyting algebra. Czech. Math. J. 37 (112) (1987).
MR 0875125 |
Zbl 0625.06004
[3] HANSOUL G., VRANCKEN-MAWET L.:
Subalgebras of closure algebras. to appear in Period. Math. Hungaria.
MR 1216801 |
Zbl 0786.06012
[4] SACHS D.:
The lattice of subalgebras of a Boolean algebra. Canad. J. Math. 14 (1962), 451-460.
MR 0137666 |
Zbl 0105.25204
[5] VRANCKEN, MAWET L.: On the subalgebra lattice of a Heyting algebra. submitted.