Donald Sannella, Lincoln A. Wallen. A Calculus for the Construction of Modular Prolog Programs. Journal of Logic and Algebraic Programming, 12(1&2):147-177, 1992.
@article{SannellaW92, title = {A Calculus for the Construction of Modular Prolog Programs}, author = {Donald Sannella and Lincoln A. Wallen}, year = {1992}, tags = {Prolog}, researchr = {https://researchr.org/publication/SannellaW92}, cites = {0}, citedby = {0}, journal = {Journal of Logic and Algebraic Programming}, volume = {12}, number = {1&2}, pages = {147-177}, }