Improving the perceived quality of half tone secret images in visual cryptography. - Yusuf Engin Tetik; Aytekin Yildizhan; Kadir Erol (SIU, 2015)

Chaotic Encryption and Privilege Based Visual Secret Sharing Model for Color Images. - Aytekin Yildizhan; Nurettin Topaloglu (Comput. Informatics, 2019)