Optimization of the design of relay valves for rail vehicles braking systems in the context of train traffic safetySylwin Tomaszewski, Franciszek Tomaszewski, Włodzimierz Stawecki, Patryk Urbański, Mariusz Far and Yaroslav BolzhelarskyiMATEC Web Conf., 294 (2019) 03013DOI: https://doi.org/10.1051/matecconf/201929403013