** I. Bakayoko and S. Attan**
Some structures of Hom-Poisson color algebras, pp.1-16

** W.A. Dudek and R.A.R. Monzo**
Biquasigroups linear over a group, pp.17-29

** S. Ebrahimi Atani**
w-supplemented property in the lattices, pp.31-44

** S. Ebrahimi Atani, M. Khoramdel, S.D.P. Hesari, M.N.R. Alipour**
SS-supplemented property in the lattices, pp.45-59

**C.E. Haliya and G.D. Houndedji**
Hom-Jacobi-Jordan and Hom-antiassociative algebras with symmetric invariant nondegenerate bilinear forms, pp.61-88

** P. Luangchaisri and T. Changphas**
On completely regular 2-duo semigroups, pp.89-96

** D.N. Moldovyan, A.A. Moldovyan, N.A. Moldovyan**
A new design of the signature schemes based on the hidden discrete logarithm problem, pp.97-106

** P. Palakawong na Ayutthaya and B. Pibaljommee**
Characterizations of ordered k-regularities on ordered semirings, pp.107-121

** C. Punkumkerd and P. Honyam**
Magnifying elements of some semigroups of partial transformations, pp.123-132

** K. Siribute, P. Palakawong na Ayutthaya and J. Eanborisoot**
Characterizations of regularities on ordered semirings by idempotency of ordered ideals, pp.133-144

** G. Souza dos Anjos**
Half-isomorphisms whose inverses are also half-isomorphisms, pp.145-156

### vol.29 (2020) No. 2