The 6th edition of the International Conference on Energy and Environment Research, ICEER 2019, took place in the end … environment issues. Nevertheless, these matters are frequently dealt with separately, reflecting the way they are taught, and … goods production and commercialization, ICEER 2019 had as focus theme the challenges posed by energy and environment …

Understanding that the environment is more than the resource base of human economic activities was a watershed in the … awareness of the real value of the environment and the need for an assessment of its quality. The complex of benefits from … intermediate link between the processes and phenomena in the environment and human well-being. The main groups of the ecosystem …

Purpose: Optimal order allocation on the part of the buyer in a multi-supplier environment has become a major concern … solutions reflect and respond to a specific company environment. Originality/value: A global analysis on several recent papers …, describing main aspects wich determines optimal order allocation in multi-supplier environment. …