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2. W. Grantz, C. Ingerslev, C. Iversen, Unique techniques for the construction of the Bosphorus Rail Tunnel. AITES-ITA World Tunnel Congress 2009, Budapest, Hungary.
3. W. Grantz, A new concept for a submerged floating tunnel. AITES-IT World Tunnel Congress 2003.
4. W. Grantz, An American’s concept for a Submerged Floating Tunnel National Science Foundation. First U.S. Workshop–Submerged Floating Tunnels, Seattle, Washington 2002.