AndronovA. A.WittA. L. and ChaikenC. E.Theory of OscillationsPergamon Press, 517–528, 1966.
7.
Flügge-LotzI.‘Discontinuous and Optimal Control Theory’McGraw-Hill, 10–12, 1968.
8.
FullerA. T.‘Relay control Systems Optimized for Various Performance CriteriaProc. 1st I.F.A.C. Moscow, 1960, Vol. 1, 510–517 (published by Butterworths, 1962)
9.
McLeanD. and StaceyL. J.‘On a Sequence of Computer Experiments’Int J. Elec. Eng. EducVol 8, 411–422, 1970.