Kovalchuk V, Sysyn M, Sobolevska J, Nabochenko O, Parneta B, Pentsak A. Theoretical study into efficiency of the improved longitudinal profile of frogs at railroad switches. EEJET [Internet]. 2018Aug.15 [cited 2024Nov.22];4(1 (94):27-36. Available from: https://journals.uran.ua/eejet/article/view/139502