Tetrakis(hydroxymethyl)glycoluril in N-methylenation reactions with arylamines / S. Yu. Panshina, O. V. Ponomarenko, B. Bakibayev, V. S. Malkov // Chemistry of heterocyclic compounds. 2020. Vol. 56, № 1. P. 112-115. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000795312