Feragen, A., Petersen, J., Grimm, D., Dirksen, A., Pedersen, J. H., Borgwardt, K., et al. (2013).
Geometric Tree Kernels: Classification of COPD from Airway Tree Geometry. In J. C. Gee, S. Joshi, K. M. Pohl, W. M. Wells,
L. Zöllei, T. Kanade, et al. (Eds.), Information Processing
in Medical Imaging (pp. 171-183).