Ledoux, H., Arroyo Ohori, K., Kumar, K. et al. CityJSON: a compact and easy-to-use encoding of the CityGML data model. Open geospatial data, softw. stand. 4, 4 (2019). https://doi.org/10.1186/s40965-019-0064-0
Hammoudi, Karim (2011). K. Hammoudi: Contributions to the 3D city modeling: 3D polyhedral building model reconstruction from aerial images and 3D facade modeling from terrestrial 3D point cloud and images. Ph.D. thesis in signal and image processing, Université Paris-Est, 234p., 2011 (Thesis). doi:10.13140/RG.2.1.2269.8000.
J. Klimke et al.: "Scalable Multi-Platform Distribution of Spatial 3D Contents". ISPRS 8th 3D GeoInfo Conference & WG II/2 Workshop 27–29 November 2013, Istanbul, Turkey, (U. Isikdag, ed.), vol. II-2/W1, ISPRS Annals, ISPRS, pp. 193-200, 2013.