Zaykovsky, V. N., and V. G. Davydov, “Corruption in the Context of the Principal-Agent Model of Relations: The Essence and the Main Causes”, Статьи, Gosudarstvennaya Sluzhba, 19/3 (2017), 36-43, https://doi.org/10.22394/2070-8378-2017-19-3-36-43.