Vorkut T. A., Lushchai Yu. V. and Kharuta, V. 2021. CONCEPTUAL MODEL OF PRECEDENT FORMATION OF A PORTFOLIO OF LOGISTICS SERVICE PROVIDERS IN LOGISTICS OUTSOURCING PROJECTS. World Science. 5(66) (May 2021). DOI:https://doi.org/10.31435/rsglobal_ws/30052021/7586.