@article{01975344,
title = {On cyclic symmetric Heyting algebras.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {58},
year = {2001},
pages = {389-406},
zbl = {1042.06007},
language = {en},
url = {http://dml.mathdoc.fr/item/01975344}
}
Abad, M.; Díaz Varela, J. P.; Fernández, A.; Meske, N.; Rueda, L. On cyclic symmetric Heyting algebras.. Portugaliae Mathematica. Nova Série, Tome 58 (2001) pp. 389-406. http://gdmltest.u-ga.fr/item/01975344/