@article{SEMR_2021_18_2_a78,
     author = {A. A. Gorodilova and N. N. Tokareva and S. V. Agievich and C. Carlet and V. A. Idrisova and K. V. Kalgin and D. N. Kolegov and A. V. Kutsenko and N. Mouha and M. A. Pudovkina and A. N. Udovenko},
     title = {The {Seventh} {International} {Olympiad} in {Cryptography:} problems and solutions},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {{\CYRA}.4--{\CYRA}.29},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2021_18_2_a78/}
}