“PHOSPHATASE ACTIVITY OF FOREST CHESTNUT AND CARBONATE SOILS, NONINFECTED AND INFECTED BY BACILLUS THURINGIENSIS BERLINER BACTERIA” (2002) Proceedings of the YSU B: Chemical and Biological Sciences, 36(3 (199), pp. 113–117. doi:10.46991/PYSUB.2002.36.3.113.