http://www.theverge.com/2014/8/8/5982355/yobi3d-is-a-search-engine-for-3d-models
http://3dprintingindustry.com/2016/01/13/64787/
http://www.fabbaloo.com/blog/2015/12/20/yobi3d-makes-searching-for-3d-models-a-lot-more-fun
http://www.3ders.org//articles/20140809-yobi3d-is-google-for-all-3d-printable-models.html