L.D. Volkova1, Zakarina N.N, Kim O.K, Akurpekova A.K, Zhumadullaev D.A, Yaskevich V.I, Grigorjeva V.P, и Gabdrakipov A.V. «KAOLINITE MODIFIED BY ALUMINUM IN THE CRACKING OF VACUUM GASOIL AND IT’S MIXTURE WITH FUEL OIL». Известия НАН РК. Серия химии и технологии, вып. 2, март 2020 г., сс. 107-14, http://89.250.84.46/chemistry-technology/article/view/917.