@article{Xu2018, author = "Di Xu and Jamie Callan", title = "{Towards a Simple and Efficient Web Search Framework}", year = "2018", month = "6", url = "https://kilthub.cmu.edu/articles/journal_contribution/Towards_a_Simple_and_Efficient_Web_Search_Framework/6473774", doi = "10.1184/R1/6473774.v1" }