TRANSFORMATIONS OF 2,6-DIMETHYL- AND 2,3-DIMETHYL-6-ETHYL-4-(2′-FURYL)PYRIDINES INVOLVING THE FURAN AND PYRIDINE RINGS Article Prostakov N.S., Soldatenkov A.T., Radzhan P.K., Khil'bert T.E. Chemistry of Heterocyclic Compounds. Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau. Vol. 18. 1982. P. 1287-1289