Bahramia, R., and R. Halladj. “Modelling and Optimization of the Tube Reactors in an Ethylene Dichloride Cracker Using Pontryagin Optimal Control Theory”. Afinidad. Journal of Chemical Engineering Theoretical and Applied Chemistry, vol. 66, no. 539, June 2009, https://raco.cat/index.php/afinidad/article/view/276659.