London Underground (English Wikipedia)

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Demartini, L. C.; Vielmo, H. A.; Möller, S. V. (2004). "Numeric and experimental analysis of the turbulent flow through a channel with baffle plates". Journal of the Brazilian Society of Mechanical Sciences and Engineering. 26 (2): 153–159. doi:10.1590/S1678-58782004000200006. hdl:10183/75781. ISSN 1678-5878.
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Yeung, Chi Ho; Saad, David; Wong, K. Y. Michael (20 August 2013). "From the physics of interacting polymers to optimizing routes on the London Underground". Proceedings of the National Academy of Sciences. 110 (34): 13717–13722. arXiv:1309.0745. Bibcode:2013PNAS..11013717Y. doi:10.1073/pnas.1301111110. ISSN 0027-8424. PMC 3752220. PMID 23898198.
Jordan, Ferenc (2008). "Predicting target selection by terrorists: a network analysis of the 2005 London underground attacks". International Journal of Critical Infrastructures. 4 (1/2): 206. Bibcode:2008IJCI....4..206J. doi:10.1504/ijcis.2008.016101. ISSN 1475-3219.

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Kent, Alexander J. (1 February 2021). "When Topology Trumped Topography: Celebrating 90 Years of Beck's Underground Map". The Cartographic Journal. 58 (1): 1–12. Bibcode:2021CartJ..58....1K. doi:10.1080/00087041.2021.1953765. S2CID 236970579.
Guo, Zhan; Wilson, Nigel H.M. (1 February 2011). "Assessing the cost of transfer inconvenience in public transport systems: A case study of the London Underground". Transportation Research Part A: Policy and Practice. 45 (2): 91–104. Bibcode:2011TRPA...45...91G. doi:10.1016/j.tra.2010.11.002. ISSN 0965-8564.
Yeung, Chi Ho; Saad, David; Wong, K. Y. Michael (20 August 2013). "From the physics of interacting polymers to optimizing routes on the London Underground". Proceedings of the National Academy of Sciences. 110 (34): 13717–13722. arXiv:1309.0745. Bibcode:2013PNAS..11013717Y. doi:10.1073/pnas.1301111110. ISSN 0027-8424. PMC 3752220. PMID 23898198.
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Quiz Mind the Gap Part 1 1999 – via YouTube.