@article{ITA_1993__27_4_327_0,
     author = {Fl\"ogel, A. and Kleine B\"uning, H. and Lettmann, T.},
     title = {On the restricted equivalence for subclasses of propositional logic},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {327--340},
     publisher = {EDP-Sciences},
     volume = {27},
     number = {4},
     year = {1993},
     mrnumber = {1238054},
     zbl = {0787.03008},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1993__27_4_327_0/}
}