@article{INTO_2020_177_a7,
     author = {M. Herzog and P. Longobardi and M. Maj},
     title = {On the sum of orders of elements in finite groups},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {74--79},
     publisher = {mathdoc},
     volume = {177},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2020_177_a7/}
}