Upper palaeolithic of Mizoch upland on the materials of Lypa I and Lypa VI sites: natural environment, age, technique of flint knapping, primeval art - A. B. Bohutskyi; O. O. Sytnyk; O. M. Tomeniuk; R. R. Koropetskyi (Materials and studies on archaeology of Sub-Carpathian and Volhynian area, 2018)