1. The state administration for industry and commerce of the People's Republic of China [Internet]. Available from: http://www.saic.gov.cn/.
2. China trademark net [Internet]. Available from: http://www.ctmo.gov.cn/.
3. Content-based of visual information retrieval;YJ Zhang;The Press of Beijing Science,2003
4. An experimental study of alternative shape-based image retrieval techniques;C Shahabi;Multimedia Tools and Applications,2007
5. Hybrid ensemble of classifiers for logo and trademark symbols recognition;B. Cyganek;Soft Computing,2015