Modification of Bicyclic Phosphonates Based on Resorcinols and Its Derivatives via the Mannich Reaction. - Sadykova, Yulia M.; Dalmatova, Natalia. V.; Voronina, Yulia K.; Burilov, Alexander R.; Pudovik, Michael A.; Mitrasov, Yuriy N.; Sinyashin, Оleg G. (Heteroatom Chemistry, 2015)