@article{CMUC_1986_27_3_a5,
     author = {\v{Z}ubrini\'c, Darko},
     title = {On the optimal control of nonresonant elliptic equations},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {471--478},
     year = {1986},
     volume = {27},
     number = {3},
     mrnumber = {873621},
     zbl = {0603.49004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1986_27_3_a5/}
}