@article{DAN_1980_250_5_a13,
     author = {V. \`E. Itkin},
     title = {A characterization of structured graphs of program jumps},
     journal = {Doklady Akademii Nauk},
     pages = {1077--1080},
     publisher = {mathdoc},
     volume = {250},
     number = {5},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_5_a13/}
}