A. Hall, and R. Fagen. General Systems, the Yearbook of the Society for Advancement of General Systems Theory, 1, The Society for Advancement of General Systems Theory, Ann Arbor, (1956)
P. Schultz, D. Spivak, and C. Vasilakopoulou. (2016)cite arxiv:1609.08086Comment: 59 pages (appendix removed); numerous revisions suggested by anonymous referee, final version to appear in `Applied Categorical Structures'.
M. Zhao, R. Panda, S. Sapatnekar, and D. Blaauw. Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on, 21 (2):
159--168(February 2002)