C. Pelea, Multialgebras and term functions over the algebra of their nonvoid subsets,
*Algebra Symposium, Cluj-Napoca*, November 23-24, 2001

C. Pelea, I. Purdea, Universal algebras, congruences and complete multialgebras,
*Algebra Symposium, Cluj-Napoca*, 2005

C. Pelea, I. Purdea, __Direct limits of direct systems of hypergroupoids associated to binary relations__, *Symposium Mathematics of Uncertainty, ECIT 2006, Iasi, Romania*, September 20-23, 2006

C. Pelea, __Multialgebras, universal algebras and identities__, *6-th Congress of Romanian Mathematicians, Bucharest, Romania*, June 28-July 4, 2007

C. Pelea, __Products of multialgebras and their fundamental algebras__, *ICTAMI 2007, Alba Iulia, Romania*, August 29-September 2, 2007

C. Pelea, I. Purdea, __Identities in multialgebra theory__, *AHA 2008, Brno, Czech Republic*, September 3-9, 2008

C. Pelea, I. Purdea, __Term functions and polynomial functions in hyperstructure theory
__, * Open problems in algebraic hyperstructure theory and applications, Univ. Al. I. Cuza, Iasi*, September 24-26, 2011

C. Pelea, __Multialgebras, factor multialgebras and universal algebras__, *Workshop on General Algebra, Dresden University of Technology*, June 7-10, 2012 (conference participation supported by the CNCS-UEFISCDI grant PN-II-RU-TE-2011-3-0065)

C. Pelea, __Term functions in multialgebra theory__, *Conference on Universal Algebra and Lattice Theory, Szeged*, June 21-25, 2012 (conference participation supported by the CNCS-UEFISCDI grant PN-II-RU-TE-2011-3-0065)

C. Pelea, __On some particular equivalence relations of multialgebras__, *9th International Conference on Applied Mathematics (ICAM 9), Baia Mare*, September 25-28, 2013 (conference participation supported by the CNCS-UEFISCDI grant PN-II-RU-TE-2011-3-0065)

C. Pelea, __Fundamental relations in multialgebras. A survey__, *AHA 2014, Xanthi, Greece*, September 2-7, 2014 (conference participation supported by the CNCS-UEFISCDI grant PN-II-RU-TE-2011-3-0065)

C. Pelea, __On some category theory constructions of multialgebras__, *11th Joint Conference on Mathematics and Computer Science, Eger*, May
20--22, 2016 (conference participation supported by the CNCS-UEFISCDI grant PN-II-ID-PCE-2012-4-0100)