Fuzzy subgroups applied to subgroups of the group of Moebius transformations. - Paavo Kukkurainen (EUSFLAT Conf., 2003)

Level-Sets as Decomposition of the Topological Space SpecA. - Paavo Kukkurainen (IFSA, 2003)

Level Sets as a Topological Base Applied to Subgroups of a Group of Moebius Transformations. - Paavo Kukkurainen (J. Adv. Comput. Intell. Intell. Informatics, 2005)

New Classifier Based on Fuzzy Level Set Subgrouping. - Paavo Kukkurainen; Pasi Luukka (KES (3), 2006)

Fuzzy Subgroups with Meet Operation in the Connection of Möbius Transformations. - Paavo Kukkurainen (IFSA (1), 2007)

Classification method using fuzzy level set subgrouping. - Paavo Kukkurainen; Pasi Luukka (Expert Syst. Appl., 2008)

Fuzzy Subgroups and the Teichmüller Space. - Paavo Kukkurainen (IFSA/EUSFLAT Conf., 2009)

Connection Between Triangular or Trapezoidal Fuzzy Numbers and Ideals. - Paavo Kukkurainen (J. Multiple Valued Log. Soft Comput., 2017)