@article{ITA_1983__17_3_231_0,
     author = {Arz, Johannes},
     title = {Syntactic congruences and syntactic algebras},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {231--238},
     publisher = {EDP-Sciences},
     volume = {17},
     number = {3},
     year = {1983},
     mrnumber = {743887},
     zbl = {0527.20052},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1983__17_3_231_0/}
}