• Efficiency and bid rigging in simultaneous procurement auctions under oligopolyHazak, Aaro; Kerikmäe, Tanel; Pärn-Lee, EvelinInternational Journal of Procurement Management (IJPM)2020 / p. 199–213 https://doi.org/10.1504/IJPM.2020.106512 https://www.scopus.com/sourceid/21100242236 https://www.scopus.com/record/display.uri?eid=2-s2.0-85083354963&origin=inward&txGid=60f7b421df686284bf47376bc975a9f4