TY JOUR TI Psychological modeling of optimum decisions in negotiations KW communications KW negotiations KW psychology KW negotiation process KW psychological modeling KW optimum decisions KW Isikava's chart and Pareto's chart JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Soshina, O.N. PY 2013 IS 2013 PB Saint-Petersburg University of State Fire Service of Emercom of Russia