Zendle D, Meyer R, Ballou N(2020). The changing face of desktop video game monetisation: An exploration of exposure to loot boxes, pay to win, and cosmetic microtransactions in the most-played Steam games of 2010-2019. PLoS One vol. 15, (5) e0232780-e0232780.
Zendle D, Meyer R, Cairns P, Waters S, Ballou N(2020). The prevalence of loot boxes in mobile and desktop games. Addiction