Varenov, Alexey, and Evgeny Sharapov. “From Estimation to Measurement. Experience of Working of a Questionnaire As Basic Personal Competences”. Gosudarstvennaya Sluzhba, vol. 15, no. 5, Sept. 2013, pp. 46-48, https://gosudarstvennaya-sluzhba.owebs.ru/article/view/21811.