A. Schmitt, and V. Schwieger. INGEO 2017 : 7th International Conference on Engineering Surveying : Proceedings, 103, page 23-30. Lisbon, Laboratório Nacional de Engenharia Civil, (2017)
O. Lerke, and V. Schwieger. MCG 2016 : 5th International Conference on Machine Control & Guidance, page 1-8. Antony, Institut national de recherche en sciences et technologies pour l’environnement et l’agriculture, (2016)