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Stirnimann, Roger (2023). Alternative drive concept: One for all, also in the future Trader, pp. 16-21. Eilbote Boomgaarden Verlag
Stirnimann, Roger (February 2022). Everything about the driver is becoming increasingly digital Trader, pp. 6-10. Eilbote Boomgaarden Verlag
Stirnimann, Roger (February 2022). Categorisation of standard tractors: part 1 Trader, pp. 15-19. Eilbote Boomgaarden Verlag
