Finding a subset of nonnegative vectors with a coordinatewise large sum. - Ilya I. Bogdanov; Grigory R. Chelnokov (Discret. Math., 2013)

On transversals of quasialgebraic families of sets. - Grigory R. Chelnokov; V. L. Dol'nikov (J. Comb. Theory A, 2014)