https://www.herrenknecht.com/en/newsroom/pressreleasedetail/singapore-tunnelling-for-sewage-superhighway-completed/

Hudson River Gateway Tunnel concrete casting plan Gateway Program media rendering: https://www.gatewayprogram.org/renderings-animations.html

Illustrasjon av ny E6 ved Vindåsliene source (before converted to jpeg) https://kommunikasjon.ntb.no/pressemelding/18012098/skanska-og-syltern-skal-bygge-ny-e6-i-trondelag%3FpublisherId%3D14424980%26lang%3Dno

  http://en.crchi.com/art/2023/9/27/art_40592_4648369.html

COMSA Montcada i Reixac railway tunnel contract https://www.comsa.com/en/infrastructures/comsa-ejecutara-las-obras-para-el-soterramiento-del-ferrocarril-en-montcada-i-reixac/

from HS2 media: https://mediacentre.hs2.org.uk/news/rail-deliveries-of-hs2s-tunnel-ring-segments-in-london-remove-a-million-miles-of-lorry-journeys

source:HS2 media https://mediacentre.hs2.org.uk/news/new-hs2-exhibition-space-opens-at-birminghams-thinktank-museum

Lyon Turin Tunnel - VINCI https://www.vinci.com/vinci.nsf/en/press-releases/pages/20231017-1745.htm

SAIMM - Herrenknecht Seminar https://www.saimm.co.za/saimm-events/upcoming-events/herrenknecht-seminar