Muntasa, A., Shopan, M. K., Purnomo, M. H. and Kunio, K. (2013) “Enhancement of the Adaptive Shape Variants Average Values by Using Eight Movement Directions for Multi-Features Detection of Facial Sketch”, Journal of ICT Research and Applications, 6(1), pp. 1-20. doi: 10.5614/itbj.ict.2012.6.1.1.