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15B34 

• Beasley, LeRoy B.; Jun, Young Bae; Song, Seok-Zun: Possible isolation number of a matrix over nonnegative integers. (English). Czechoslovak Mathematical Journal, vol. 68 (2018), issue 4, pp. 1055-1066
• Štěpánová, Martina: Sylvesterovy–Hadamardovy, Kravčukovy a Sylvesterovy–Kacovy matice. (Czech) [Sylvester–Hadamard matrices, Krawtchouk matrices and Sylvester–Kac matrices]. Pokroky matematiky, fyziky a astronomie, vol. 62 (2017), issue 2, pp. 81-101
• Kautsky, Jaroslav: Factorization makes fast Walsh, PONS and other Hadamard-like transforms easy. (English). In: Brandts, J., Korotov, S., Křížek, M., Segeth, K., Šístek, J. and Vejchodský, T. (eds.): Application of Mathematics 2015, In honor of the birthday anniversaries of Ivo Babuška (90), Milan Práger (85), and Emil Vitásek (85). Proceedings. Prague, November 18-21, 2015. Institute of Mathematics CAS, Prague, 2015. pp. 100-109
• Beasley, LeRoy B.; Song, Seok-Zun; Jun, Young Bae: Linear operators that preserve graphical properties of matrices: isolation numbers. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 3, pp. 819-826
• Beasley, LeRoy B.; Song, Seok-Zun: Linear operators that preserve Boolean rank of Boolean matrices. (English). Czechoslovak Mathematical Journal, vol. 63 (2013), issue 2, pp. 435-440
• Chen, Yizhi; Zhao, Xianzhong: On linear operators strongly preserving invariants of Boolean matrices. (English). Czechoslovak Mathematical Journal, vol. 62 (2012), issue 1, pp. 169-186
• Brualdi, Richard A.; Kiernan, Kathleen P.: Hall exponents of matrices, tournaments and their line digraphs. (English). Czechoslovak Mathematical Journal, vol. 61 (2011), issue 2, pp. 461-481
• Kang, Kyung-Tae; Song, Seok-Zun: Linear maps that strongly preserve regular matrices over the Boolean algebra. (English). Czechoslovak Mathematical Journal, vol. 61 (2011), issue 1, pp. 113-125