THE PROLIFERATIVE ACTIVITY OF TUMOR CELLS AND THE DISTRIBUTION OF SOX2+ PLURIPOTENT STEM CELLS IN VARIOUS HISTOLOGICAL TYPES OF AMELOBLASTOMA Article Babichenko I.I., Rybalskaya V.F., Tsimbalist N.S., Semkin V.A. Arkhiv Patologii. Vol. 80. 2018. P. 21-26