1. L. Meyer III, J. Peschon R.M. Dressler, "Optimal Control of Measurements Subsystems"m IEEE Transactions on Aut. Control, vol. AC-12, nr.5, 1967, pp 528–536.
2. M. Aoki, M.T. Li, "Optimal Discrete-Time Control System with Cost for Observation", IEEE Transact. on Aut. Control, vol AC-14, nr. 2, 1969, pp 165–175.
3. C.A. Cooper, N.E. Nahi, "An Optimal Stochastic Control Problem with Observation Cost", IEEE Transact on Aut. Control, vol. AC-16, 1971, pp 185–189.
4. N.M. Olgac, C.A. Cooper, R. Longman, "Time Lagged Stochastic Control Problems with Observation Cost", Proceedings of the JACC 1976, West Lafayette, Indiana.
5. Y.C. Ho, K.C. Chu, "Information Structure in Dynamic Multi-Person Control Problems", Automatica, vol. 10, nr. 4, 1974, pp. 341–351.