Neis, P., & Zipf, A. (2008). Extending the OGC OpenLS Route Service to 3D for an interoperable realisation of 3D focus maps with landmarks: An interoperable approach. Journal of location based services, 2($p153-174), .
Chicago Style (17th ed.) CitationNeis, Pascal, and Alexander Zipf. "Extending the OGC OpenLS Route Service to 3D for an Interoperable Realisation of 3D Focus Maps with Landmarks: An Interoperable Approach." Journal of Location Based Services 2, no. $p153-174 (2008).
MLA (9th ed.) CitationNeis, Pascal, and Alexander Zipf. "Extending the OGC OpenLS Route Service to 3D for an Interoperable Realisation of 3D Focus Maps with Landmarks: An Interoperable Approach." Journal of Location Based Services, vol. 2, no. $p153-174, 2008.
Warning: These citations may not always be 100% accurate.