G. Cook, J. E. Funk. Quadratic control problem with an energy constraint; approximate solutions. Automatica, 4(5-6):351-363, 1968. [doi]
@article{CookF68,
title = {Quadratic control problem with an energy constraint; approximate solutions},
author = {G. Cook and J. E. Funk},
year = {1968},
doi = {10.1016/0005-1098(68)90007-1},
url = {http://dx.doi.org/10.1016/0005-1098(68)90007-1},
researchr = {https://researchr.org/publication/CookF68},
cites = {0},
citedby = {0},
journal = {Automatica},
volume = {4},
number = {5-6},
pages = {351-363},
}