@article{SMJ2_2002_28_4_a6,
     author = {Leviatan, D. and Shevchuk, I.},
     title = {Nearly {Coconvex} {Approximation}},
     journal = {Serdica Mathematical Journal},
     pages = {361--378},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2002_28_4_a6/}
}