Peter Naur. Remarks on algorithm 42: invert. Communications of the ACM, 6(1):38, 1963. [doi]
@article{Naur63, title = {Remarks on algorithm 42: invert}, author = {Peter Naur}, year = {1963}, doi = {10.1145/366193.366232}, url = {http://doi.acm.org/10.1145/366193.366232}, researchr = {https://researchr.org/publication/Naur63}, cites = {0}, citedby = {0}, journal = {Communications of the ACM}, volume = {6}, number = {1}, pages = {38}, }