INDENYL AND FLUORENYL TRANSITION METAL COMPLEXES. VIII. SYNTHESIS, STRUCTURE AND PROPERTIES OF METAL CARBONYL DERIVATIVES OF AZAFLUORENES, INDOLE, CARBAZOLE AND THE CORRESPONDING ANIONS Article Nesmeyanov A.N., Ustynyuk N.A., Thoma T., Prostakov N.S., Soldatenkov A.T., Pleshakov V.G., Urga K., Ustynyuk Yu.A., Trifonova O.I., Oprunenko Yu.F. Journal of Organometallic Chemistry. Vol. 231. 1982. P. 5-24
2-PHENYL-9AH-BENZO[5,6]PYRIDO[1,2,3-C,D]AZAPENTALENE Article Prostakov N.S., Soldatenkov A.T., Bagdadi M.V. Chemistry of Heterocyclic Compounds. Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau. Vol. 18. 1982.