Черкасов, Василий Евдокимович, and Евгений Вячеславович Ваховский. “NONSTANDARD FORMS OF EMPLOYMENT IN CONDITIONS OF POSTINDUSTRIAL ECONOMY”. The Bulletin of the Volga Region Institute of Administration, vol. 31, no. 2, Feb. 2012, pp. 205-12, https://volga-institute.owebs.ru/article/view/23626.