Nekrasov, D. D.     Synthesis of 5-and 6-membered nitrogen containing heterocycles based on 5-aryl-2,3-dihydrofuran-2,3-diones and N-cyanoaminocompounds / D. D. Nekrasov, M. A. Rudenko // VIth International Conference on Organic Synthesis. - Moscow, 1986. - С. 155 Доп.точки доступа: Rudenko, M. A.