4Hoepfner, H.- D. Self- reliant Learning in Technical Education and Vocational Training. BoBBBerlin, [M],Germany, 2003.
5Chen,Hsiang-Ru.Cheng,Bor-Wen.A case study in solving customer complaints based on the 8Ds method and Kano model [J].Joumal of the Chinese Institute of Industrial Engineers,v 27, n5,p339-350,September 2010.
