@article{CC_2005_34_2_a4,
     author = {Chryssoverghi, I.},
     title = {Approximate gradient projection method with general {Runge-Kutta} schemes and piecewise polynomial controls for optimal control problems},
     journal = {Control and Cybernetics},
     pages = {425--451},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {2005},
     zbl = {1167.49319},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2005_34_2_a4/}
}