PMI-cool at SemEval-2016 Task 3: Experiments with PMI and Goodness Polarity Lexicons for Community Question Answering. - Daniel Balchev; Yasen Kiprov; Ivan Koychev; Preslav Nakov (SemEval@NAACL-HLT, 2016)

SUper Team at SemEval-2016 Task 3: Building a Feature-Rich System for Community Question Answering. - Tsvetomila Mihaylova; Pepa Gencheva; Martin Boyanov; Ivana Yovcheva; Todor Mihaylov; Momchil Hardalov; Yasen Kiprov; Daniel Balchev; Ivan Koychev; Preslav Nakov; Ivelina Nikolova; Galia Angelova (SemEval@NAACL-HLT, 2016)

Large-Scale Goodness Polarity Lexicons for Community Question Answering. - Todor Mihaylov; Daniel Balchev; Yasen Kiprov; Ivan Koychev; Preslav Nakov (SIGIR, 2017)