Codes Base on Unambiguous Products. - Ho Ngoc Vinh; Vu Thanh Nam; Phan Trung Huy (ICCCI (3), 2010)

An Extension of Codes by Unambiguity of Languages. - Nguyen Dinh Han; Ho Ngoc Vinh; Phan Trung Huy (IIH-MSP, 2012)

Algorithms for Testing of Codes and Lozenge-Codes. - Nguyen Dinh Han; Ho Ngoc Vinh; Dang Quyet Thang; Phan Trung Huy (RIVF, 2012)

Quadratic Algorithms for Testing of Codes and ◊-Codes. - Nguyen Dinh Han; Ho Ngoc Vinh; Dang Quyet Thang; Phan Trung Huy (Fundam. Informaticae, 2014)