D. Lee, S. Yu, and H. Yu. Proceedings of the 26th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining, page 1362–1370. New York, NY, USA, Association for Computing Machinery, (2020)
W. Liao, B. Rosenhahn, and Y. Michael. International Society for Photogrammetry and Remote Sensing ISA workshop, La Grande Motte, France, (September 2015)
C. Williams, and C. Rasmussen. Advances in Neural Information Processing Systems 8, MIT, Copyright of the Massachusetts Institute of Technology Press (MIT Press).(June 1996)