Tykhonova, O.M., K.S. Kyrylchuk, and V.P. Shapoval. 2020. “Investigation of Cross Content of Nickel and Arsene in Motorway Trains of Sumy”. Bulletin of Sumy National Agrarian University. The Series: Agronomy and Biology 40 (2), 62-71. https://doi.org/10.32782/agrobio.2020.2.8.