1. Buckley, P.S. (1970). Override Controls on a Chemical Reactor. Proc. of Twenty-Fifth Annual Symposium on Instrumentation for the Process Industries, 6–12.
2. Crosby J.E. and L.D. Durbin (1974). Selection of Process Variable Feedback Control - A New Systematic Scheme. Sixth Annual Symp. on System Theory, Baton Rouge, Louisiana, Session TP-3.
3. Design and Application of State Variable Feedback Controllers for a Packed Trickle Bed Column with Carbon Dioxide Absorption;Crosby;Proc. JACC,1976
4. Cinar, A. (1976). On-line Suboptimal Feedback Control of a Trickle-Bed Absorption Column. Ph.D. Thesis, Texas A&M University.
5. Dynamic Control of a Fluid Catalytic Cracking Unit;Gould;Automatica,1970