@article{Lupal2016development,
author={Lupal, N.V.},
title={Development of signalling, centralization and blocking devices during the period of industrial capitalism (1861-1900). Part 4: Centralization of switches and signals},
journal={Transport automation research},
publisher={FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"},
year={2016},
pages={300-310},
volume={2},
issue={2},
}