Stål Aanderaa, Harry R. Lewis. Prefix Classes of Krom Formulas. Journal of Symbolic Logic, 38(4):628-642, 1973.
@article{AanderaaL73, title = {Prefix Classes of Krom Formulas}, author = {Stål Aanderaa and Harry R. Lewis}, year = {1973}, researchr = {https://researchr.org/publication/AanderaaL73}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Logic}, volume = {38}, number = {4}, pages = {628-642}, }