BU, Jiajun; YAN, Wen; CHEN, Chun a SONG, Migli. Image-based Real-time Hatching of Scene Traveling. Václav Skala - UNION Agency, 2006. Dostupné také z: http://wscg.zcu.cz/WSCG2006/Papers_2006/Full/!WSCG2006_Full_Proceedings_Final.pdf.