@article{10_4064_am_14_3_371_375,
     author = {S. Grzeg\'orski and H. Pop{\l}awska},
     title = {On a method of optimization},
     journal = {Applicationes Mathematicae},
     pages = {371--375},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1974},
     doi = {10.4064/am-14-3-371-375},
     zbl = {0307.90072},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-14-3-371-375/}
}