@article{YJOR_1992_2_2_a3,
     author = {Dubravka \'Ce\'cez-Kecmanovi\'c and Olivera Kru\v{s}evac and Radivoj Petrovi\'c},
     title = {Formal {Model} of {Activities} {As} a {Segment} of {Organizational} {Stock} of {Knowledge}},
     journal = {Yugoslav journal of operations research},
     pages = {187 },
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_1992_2_2_a3/}
}