@incollection{MEM_2010_39_1_a9,
     author = {Ginchev, Ivan},
     title = {l-stable {Functions} and {Constrained} {Optimization}},
     booktitle = {},
     series = {Mathematics and Education in Mathematics},
     pages = {129--134},
     year = {2010},
     volume = {39},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MEM_2010_39_1_a9/}
}