@ARTICLE{,
author = {D. Epley},
journal = {IEEE Transactions on Computers},
title = {R68-5 Models of Computational Systems?Cyclic to Acyclic Graph Transformations},
year = {1968},
volume = {17},
number = {},
pages = {191-192},
keywords={null},
doi = {10.1109/TC.1968.229086},
url = {doi.ieeecomputersociety.org/10.1109/TC.1968.229086},
ISSN = {0018-9340},
month={02}
}