"Provisional Convention... concerning the junction of the Japanese and Russian Railways in Manchuria" - June 13, 1907. Endowment for International Peace (2009). Manchuria: Treaties and Agreements. BiblioBazaar, LLC. p. 108. ISBN1-113-11167-4。
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Haywood, R. M. (1969年3月). “The Question of a Standard Gauge for Russian Railways, 1836-1860”. Slavic Review28 (1): 72–80. doi:10.2307/2493039.
“Ratatekniset määräykset ja ohjeet”. Finnish Rail Administration. 2020年2月9日閲覧。 “The nominal track gauge on the rail network 1,524 mm. The max tolerance range in lowest quality lines (class 6, max speed 50 km/h) is −7…+20 mm”
