@incollection{MEM_2011_40_1_a2,
     author = {Nikolov, Nikolai},
     title = {Convexity, {C-convexity} and {Pseudoconvexity}},
     booktitle = {},
     series = {Mathematics and Education in Mathematics},
     pages = {54--60},
     year = {2011},
     volume = {40},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MEM_2011_40_1_a2/}
}