Book Review: Niels van Antwerpen, Cross-border provision of air navigation services with specific reference to Europe. Doctoral Thesis Leiden University, the Netherlands, 29 November 2007 - Air and Space Law View Book Review: Niels van Antwerpen, Cross-border provision of air navigation services with specific reference to Europe. Doctoral Thesis Leiden University, the Netherlands, 29 November 2007 by - Air and Space Law Book Review: Niels van Antwerpen, Cross-border provision of air navigation services with specific reference to Europe. Doctoral Thesis Leiden University, the Netherlands, 29 November 2007 33 2 Air and Space Law