Learning to recommend with explicit and implicit social relations.

@article{ma-2011-learning, author = {Hao Ma and Irwin King and Michael R. Lyu}, title = {{Learning to recommend with explicit and implicit social relations}}, journal = {ACM Transactions on Intelligent Systems and Technology (TIST)}, volume = {2}, number = {3}, pages = {29:1--29:19}, year = {2011}, url = {https://doi.org/10.1145/1961189.1961201}, doi = {https://doi.org/10.1145/1961189.1961201} }