Minasyan, H. J., and J. M. Javrshyan. “INFLUENCE OF UV-RADIATION ON «HYPERCHROMIC EFFECT» INDUCED BY GASEOUS AMMONIA AT PLANTS’ LEAVES”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 43, no. 3 (220), Oct. 2009, pp. 27-34, doi:10.46991/PYSU:B/2009.43.3.027.