1. Algorithms for linear optimal control laws and the weighting matrices in sampled-data linear optimal regulator problems;Salami,1978
2. An algorithm for the weighting matrices in sampled-data optimal regulator problem;Armstrong;NASA technical note, TN D-8372,1976
3. E.S. Armstrong, Series representation for the weighting matrices in the sampled-data optimal regulator problem. NASA paper
4. E.S. Armstrong, or ACLS, Computer program to implement the optimal sampled-data regulator problem. Users manual. NASA
5. Linear Optimal Control;Anderson,1971