R.R. Tan, K.B. Aviso, J.J. Klemes, H.L. Lam, P.S. Varbanov, F. Friedler, Towards Generalized Process Networks: Prospective New Research Frontiers for the P-graph Framework , Chemical Engineering Transactions. 70 (2018) 91-96. doi:10.3303/CET1870016.