TY JOUR TI Regression modeling of preparatory works during construction of industrial facilities KW Preparatory period in construction KW main period in construction KW mathematical modeling KW regression analysis JO Construction production AU Oleynik, P.P. AU Avetisyan, R.T. AU Kazaryan, R.R. AU Grechanichenko, A.A. PY 2026 IS PB Publishing Center RIOR