1. Canadian Pacific Railway;Corporate Sustainability Report,2020
2. Environmental Protection Agency;Code of Federal Regulations, Subchapter U, Part 1033 - Control of Emissions from Locomotives
3. Analysis of positioning methods using Global Navigation Satellite Systems (GNSS) in Polish State Railways (PKP);Specht;Zeszyty Naukowe Akademii Morskiejw Szczecinie,2020
4. Programmable Logic Controllers in the Context of Industry 4.0