A subdirectly irreducible symmetric Heyting algebra which is not simple.
Galli, A. ; Sagastume, M.
Portugaliae Mathematica. Nova Série, Tome 51 (1994), p. 141-146 / Harvested from The Electronic Library of Mathematics
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Publié le : 1994-01-01
EUDML-ID : urn:eudml:doc:47027 
@article{00639849,
     title = {A subdirectly irreducible symmetric Heyting algebra which is not simple.},
     journal = {Portugaliae Mathematica. Nova S\'erie},
     volume = {51},
     year = {1994},
     pages = {141-146},
     zbl = {0803.06013},
     language = {en},
     url = {http://dml.mathdoc.fr/item/00639849}
}

Galli, A.; Sagastume, M. A subdirectly irreducible symmetric Heyting algebra which is not simple.. Portugaliae Mathematica. Nova Série, Tome 51 (1994) pp. 141-146. http://gdmltest.u-ga.fr/item/00639849/