Robust blind digital image watermarking scheme based on stationary wavelet transform. - P. V. Nagarjuna; K. Ranjeet (IC3, 2013)

SWT and Spread Spectrum Coding Based Copyright Protection Technique for Digital Images. - P. V. Nagarjuna; Dharmender Tyagi; B. Ramachandra Reddy (ICCBB, 2017)