@article{Subbotin2014method,
author={Subbotin, K.. and Panova, M.. and Tyger, L..},
title={Method of paired comparisons as contributing to solving ecological problems of wastewater sludge processing},
journal={Services in Russia and abroad},
publisher={Russian State University of Tourism and Service},
year={2014},
pages={138-149},
volume={8},
issue={4},
}