@article{TM2_2005_VIII_2_a1,
     author = {{\DJ}ur{\dj}ica Taka\v{c}i and Dragoslav Herceg and Radivoje Stojkovi\'c},
     title = {Possibilities and limitations of {Scientific} {Workplace} in studying trigonometric functions},
     journal = {The Teaching of Mathematics},
     pages = {61 },
     publisher = {mathdoc},
     volume = {VIII},
     number = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2005_VIII_2_a1/}
}