WASET
Joshi, K. , Yadav, R. , Yadav, A.. "An Additive Watermarking Technique in Gray Scale Images Using Discrete Wavelet Transformation and Its Analysis on Watermark Strength". World Academy of Science, Engineering and Technology, Open Science Index 115, International Journal of Computer and Information Engineering (2016), 10(7), 1428 - 1433.