@article{YJOR_2001_11_1_a4,
     author = {Predrag V. Krtolica and Predrag S. Stanimirovi\'c},
     title = {Symbolic {Derivation} {Without} {Using} {Expression} {Trees}},
     journal = {Yugoslav journal of operations research},
     pages = {61 },
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2001},
     zbl = {1041.68133},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2001_11_1_a4/}
}