Tripartite Heterogeneous Graph Propagation for Large-scale Social Recommendation. - Kyung-Min Kim; Dong-Hyun Kwak; Hanock Kwak; Young-Jin Park; Sangkwon Sim; Jae-Han Cho; Minkyu Kim; Jihun Kwon; Nako Sung; Jung-Woo Ha 001 (RecSys (Late-Breaking Results), 2019)