Đapić, Petar; Marković, Petar; Martin, Barnaby Quantified constraint satisfaction problem on semicomplete digraphs. (English) Zbl 1367.68115 ACM Trans. Comput. Log. 18, No. 1, Article No. 2, 47 p. (2017). MSC: 68Q25 05C20 05C85 68Q17 PDFBibTeX XMLCite \textit{P. Đapić} et al., ACM Trans. Comput. Log. 18, No. 1, Article No. 2, 47 p. (2017; Zbl 1367.68115) Full Text: DOI Link
Chen, Hubie On the complexity of existential positive queries. (English) Zbl 1288.68161 ACM Trans. Comput. Log. 15, No. 1, Article No. 9, 20 p. (2014). MSC: 68Q60 03B20 68Q17 68Q25 PDFBibTeX XMLCite \textit{H. Chen}, ACM Trans. Comput. Log. 15, No. 1, Article No. 9, 20 p. (2014; Zbl 1288.68161) Full Text: DOI arXiv Link