Kaleicheva, Julieta, et al. “TRIBOLOGICAL PROPERTIES AND MICROSTRUCTURE OF ELECTROLESS NICKEL COATINGS REINFORCED WITH NANOPARTICLES”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, vol. 3, June 2019, pp. 88-91, https://doi.org/10.17770/etr2019vol3.4182.