Formation of Two-ring Polycyclic Aromatic Hydrocarbons via the Recombination of Benzyl and Propargyl Radicals under the Circumstellar Envelopes Conditions of Asymptotic Giant Branch Stars. - Krasnoukhov, V. S.; Pivovarov, P. S.; Zagidullin, M. V.; Azyazov, V. N.; Mebel, A. M.; Morozov, A. N. (Astronomy Reports, 2022)