Tykhonova, O., Kyrylchuk, K. and Shapoval , V. 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 (Oct. 2020), 62-71. DOI:https://doi.org/10.32782/agrobio.2020.2.8.