@article{TM2_2009_XII_1_a4,
     author = {Dragoslav Herceg and {\DJ}or{\dj}e Herceg},
     title = {The definite integral and computer},
     journal = {The Teaching of Mathematics},
     pages = {33 },
     publisher = {mathdoc},
     volume = {XII},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2009_XII_1_a4/}
}