Actual problems of Russian law
Reference:
Blagodir A.L. (2011). K voprosu o vertikal'noi (ierarkhicheskoi) strukture zakonodatel'stva v sfere sotsial'nogo obespecheniya. Actual problems of Russian law, 1, 186–193. https://en.nbpublish.com/library_read_article.php?id=61587