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20E34 General structure theorems (7 articles)

• Guo, Pengfei; Liu, Jianjun: Finite groups whose all proper subgroups are $\mathcal {C}$-groups. (English). Czechoslovak Mathematical Journal, vol. 68 (2018), issue 2, pp. 513-522
• Nikandish, Reza; Miraftab, Babak: A note on infinite $aS$-groups. (English). Czechoslovak Mathematical Journal, vol. 65 (2015), issue 4, pp. 1003-1009
• Kurdachenko, L. A.; Subbotin, I. Ya.; Ermolkevich, T. I.: On non-periodic groups whose finitely generated subgroups are either permutable or pronormal. (English). Mathematica Bohemica, vol. 138 (2013), issue 1, pp. 61-74
• Ashrafi, Ali Reza; Shi, Wujie: On $7$- and $8$-decomposable finite groups. (English). Mathematica Slovaca, vol. 55 (2005), issue 3, pp. 253-262
• Ashrafi, Ali Reza; Zhao, Yaoqing: On $5$- and $6$-decomposable finite groups. (English). Mathematica Slovaca, vol. 53 (2003), issue 4, pp. 373-383
• Voráč, František: Subgroups and normal subgroups as systems of ideals. (English). Archivum Mathematicum, vol. 16 (1980), issue 4, pp. 239-244
• Zapletal, Josef: Distinguishing subsets of semi-groups and groups. (English). Archivum Mathematicum, vol. 4 (1968), issue 4, pp. 241-251