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Author: Cho, Jung R.

• Cho, Jung R.; Kepka, Tomáš: Infinite simple zeropotent paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 4, pp. 769-775
• Cho, Jung R.; Kepka, Tomáš: Finite simple zeropotent paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 52 (2002), issue 1, pp. 41-53
• Cho, Jung R.; Ježek, Jaroslav; Kepka, Tomáš: Paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 2, pp. 277-290
• Cho, Jung R.; Ježek, Jaroslav; Kepka, Tomáš: Simple paramedial groupoids. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 2, pp. 391-399