A Genetic Algorithm Approach to Designing Finite-Precision PID Controller Structures. Whidborne, J. In Proceedings of the 1999 American Control Conference, volume 6, pages 4338--4342, 1999. IEEE.
bibtex   
@inproceedings{Whidborne99,
     author = {J.F. Whidborne},
     title = {A {G}enetic {A}lgorithm {A}pproach to {D}esigning {F}inite-{P}recision
     {PID} {C}ontroller {S}tructures},
     booktitle = {Proceedings of the 1999 American Control Conference},
     volume = {6},
     pages = {4338--4342},
     publisher = {IEEE},
     year = {1999}
}

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