Z. Tuncer, D. Porta, M. Wirth, and M. Hellenschmidt. Proceedings of the 72th International Conference Agricultural Engineering (LAND.TECHNIK.2014), Verein Deutscher Ingenieure (VDI), (November 2014)
D. Porta, Z. Tuncer, M. Wirth, and M. Hellenschmidt. Proceedings of the Eighth International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies (UBICOMM 2014), Rome, Italy, page 227-232. International Academy, Research and Industry Association (IARIA), (August 2014)
D. Sonntag, D. Porta, and J. Setz. Proceedings of the 4nd International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies (UBICOMM-10), page 170-175. IARIA/XPS (Xpert Publishing Services), (October 2010)
D. Porta. Informatik 2010: Service Science - Neue Perspektiven für die Informatik, Beiträge der 40. Jahrestagung der Gesellschaft für Informatik e.V. (GI), Band 1, volume 175 of LNI, page 497-502. GI, (September 2010)
R. Nesselrath, and D. Porta. Proceedings of the 7th IJCAI Workshop on Knowledge and Reasoning in Practical Dialogue Systems (KRPDS-11), page 37-47. (July 2011)
D. Porta, D. Sonntag, and R. Neßelrath. Proceedings of the 4th Workshop on Speech in Mobile and Pervasive Environments (SiMPE '09) in conjunction with MobileHCI '09, ACM, (2009)