Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MORISHIMA Atsuyuki,CyLog/Crowd4U: A Declarative Platform for Complex Data-centric Crowdsourcing,Proceedings of 38th International Conference on Very Large Data Bases,,,2012,38,,647-648,https://cir.nii.ac.jp/crid/1010282257080853783,