I. Park, J., Y. Lee, and S. Yoon. “Partition-Based Hybrid Decoding (PHD): A Class of ML Decoding Schemes for MIMO Signals Based on Tree Partitioning and Combined Depth- and Breadth-First Search”. Journal of Applied Research and Technology, vol. 11, no. 2, Apr. 2013, doi:10.1016/S1665-6423(13)71531-1.