Fully Polynomial-Time Approximation Scheme for a Problem of Finding a Subsequence. - Alexander Kelmanov; Sergey A. Khamidullin; Semyon Romanchenko (DOOR (Supplement), 2016)

On a Problem of Summing Elements Chosen from the Family of Finite Numerical Sequences. - Alexander Kel'manov; Ludmila Mikhailova; Semyon Romanchenko (AIST, 2018)