A computational study of aromaticity and photophysical properties of unsymmetrical azatrioxa[8]circulenes / G. V. Baryshnikov, R. R. Valiev, B. F. Minaev, H. Ågrena // New journal of chemistry. 2017. Vol. 41, № 7. P. 2717-2723. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000645480