[1] P. Corsini, V. Leoreanu, Application of hyperstructure theory, Kluwer Academic Publishers,
2003.
[2] B. Davvaz, A brief survey of the theory of Hv-structures, 8th AHA, Greece, Spanidis, (2003),
39-70.
[3] B. Davvaz, V. Leoreanu, Hyperring theory and applications, International Academic Press,
2007.
[4] B. Davvaz, T. Vougiouklis, A walk through weak hyperstructures, Hv-Structures, World Sci-
enti c, 2018.
[5] P. Kambaki-Vougioukli, A. Karakos, N. Lygeros, T. Vougiouklis, Fuzzy instead of discrete,
Annals of Fuzzy Mathematics and Informatics, 2(1) (2011), 81-89.
[6] P. Kambaki-Vougiouklis, P. Nikolaidou, T. Vougiouklis, Questionnaires in linguistics using
the bar and the Hv-structures, In Recent Trends in Social Systems: Quantitative Theories
and Quantitative Models, Springer International Publishing, (2017), 257-266.
[7] P. Kambaki-Vougioukli, T. Vougiouklis, Bar instead of scale, Ratio Sociologica, 3 (2008),
49-56.
[8] P. Nikolaidou, Multiple ways of processing in questionnaires, Ratio Mathematica, 139 (2017),
doi: 10.23755/rm.v33i0.376.
[9] P. Nikolaidou, Questionnaires, bar and hyperstructures In: C. Flaut, S. Hoskova - Mayerova
, D. Flaut (eds) Models and Theories in Social Systems, Studies in Systems, Decision and
Control, 179. Springer, Cham, (2019), 121-132
[10] P. Nikolaidou, T. Vougiouklis, Hv-structures and the bar in questionnaires, Italian Journal of
Pure Applied Mathematics, 2 (2012), 341-350.
[11] P. Nikolaidou, T. Vougiouklis, Hv-structures and the Bar in questionnaires, Italian Journal
of Pure Applied Mathematics, 29 (2012), 341-350.
[12] P. Nikolaidou, T. Vougiouklis, Hyperstructures in Questionnaires, Proceedings of 12th AHA,
Algebraic Hyperstructures and its Applications, Xanthi, Greece, 2014.
[13] P. Nikolaidou, T. Vougiouklis, The Lie-Santilli admissible hyperalgebras of type An, Ratio
Mathematica, 26(1) (2018), 113-128.
[14] R.M. Santilli, T. Vougiouklis, Lie-admissible hyperalgebras, Italian Journal of Pure and Ap-
plied Mathematics, 31 (2013), 239-254.
[15] T. Vougiouklis, Generalization of P-hypergroups, Rendiconti del Circolo Matematico di
Palermo Series II, 36 (1987), 114-121.
[16] T. Vougiouklis, Representations of hypergroups by hypermatrices, Rivista Matematica Pura
ed Applicata, 2 (1987), 7-19.
[17] T. Vougiouklis, The fundamental relation in hyperrings. The general hyper eld, 4th AHA
Congress, World Scienti c, (1991), 203-211.
[18] T. Vougiouklis, Hyperstructures and their representations, Monographs in Mathematics,
Hadronic Press, 1994.
[19] T. Vougiouklis, On Hv-rings and Hv-representations, Discrete Mathematics, 208/209 (1999),
615-620.
[20] T. Vougiouklis, A hyperoperation de ned on a groupoid equipped with a map, Ratio Mathe-
matica on line, 1 (2005), 25-36.
[21] T. Vougiouklis, Bar and theta hyperoperations, Ratio Mathematica, 21 (2011), 27-42.
[22] T. Vougiouklis, The Lie-hyperalgebras and their fundamental relations, Southeast Asian Bul-
letin of Mathematics, 37(4) (2013), 601-614.
[23] T. Vougiouklis, Fundamental Relations in Hv-structures. The Judging from the Results' proof,
Journal of Algebraic Hyperstrucures and Logical Algebras (JAHLA), 1(1) (2020), 21-36.
[24] T. Vougiouklis, P. Kambaki-Vougioukli, On the use of the bar, China-USA business review,
10(6) (2011), 484-489.
[25] T. Vougiouklis, P. Kambaki-Vougioukli, Bar in questionnaires, China-USA business review,
12(10) (2013), 691-697.
)
