https://www.ippr.org/files/2017-09/cej-interim-report-summary-170911.pdf
https://gcaptain.com/china-europe-rail-lines-supply-china/?subscriber=true&goal=0_f50174ef03-401209d0eb-170450703&mc_cid=401209d0eb&mc_eid=4069c37bba
https://ldtcoop.medium.com/data-science-versus-econometrics-a13ec6e8d1b5
https://www.propublica.org/article/how-big-pharma-company-stalled-tuberculosis-vaccine-to-pursue-bigger-profits