Kusner, Matt, Wenlin Chen, Quan Zhou, Zhixiang (Eddie) Xu, Kilian Weinberger, and Yixin Chen. 2014. “Feature-Cost Sensitive Learning With Submodular Trees of Classifiers”. Proceedings of the AAAI Conference on Artificial Intelligence 28 (1). https://doi.org/10.1609/aaai.v28i1.8967.