3-SUBSTITUTED PYRIDINES. PREPARATION OF 3, 5-DIMETHYLPYRIDINE4-PHENYLDIPYRIDINE, AND SYNTHESES BASED ON IT Article Prostakov N.S., Sorokin O.I., Ismailov A.Ya. Chemistry of Heterocyclic Compounds. Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau. Vol. 3. 1969. P. 541-542