@article{Rykhlov2014on,
author={Rykhlov, V..},
title={On multiple completeness of the root functions Of the sameclass of pencils of differential operators},
journal={Actual directions of scientific researches of the XXI century: theory and practice},
publisher={FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov},
year={2014},
pages={136-139},
volume={2},
issue={4},
}