TY JOUR TI SECURITY OF LABOR UNDER CONTRACTORS WITH THE EXPECTATION OF FASTENERS RETAINING WALLS TOOLS OF APPLIED MECHANICS KW safety KW earthworks KW retaining walls KW construction KW theory of elasticity KW mechanics of materials KW applied mechanics. JO Modeling of systems and processes AU Nikolenko, S.D. AU Sazonova, S.. PY 2016 IS 9 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov