William E. Howden. A program for the construction of PERT flow charts. Comput. J., 10(3):278-281, 1967. [doi]
@article{Howden67, title = {A program for the construction of PERT flow charts}, author = {William E. Howden}, year = {1967}, doi = {10.1093/comjnl/10.3.278}, url = {https://doi.org/10.1093/comjnl/10.3.278}, researchr = {https://researchr.org/publication/Howden67}, cites = {0}, citedby = {0}, journal = {Comput. J.}, volume = {10}, number = {3}, pages = {278-281}, }