@article{FPM_2000_6_3_a13,
     author = {A. E. Pentus and M. R. Pentus},
     title = {Object-oriented representation of hierarchical {Petri} nets},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {831--840},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2000_6_3_a13/}
}