@article{TM2_2010_XIII_1_a0,
     author = {Miodrag Mateljevi\'c and Marek Svetlik},
     title = {A contribution to the development of functional thinking related to convexity},
     journal = {The Teaching of Mathematics},
     pages = {1 },
     year = {2010},
     volume = {XIII},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2010_XIII_1_a0/}
}