Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AMLG_1982__22_137990, author = {S.O. Aanderaa and E. B\"orger}, title = {Prefix classes of {Krom} formulae with identity.}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {43--50}, publisher = {mathdoc}, volume = {22}, year = {1982}, zbl = {0494.03007}, url = {http://geodesic.mathdoc.fr/item/AMLG_1982__22_137990/} }
S.O. Aanderaa; E. Börger. Prefix classes of Krom formulae with identity.. Archiv für mathematische Logik und Grundlagenforschung, Tome 22 (1982), pp. 43-50. http://geodesic.mathdoc.fr/item/AMLG_1982__22_137990/