** M. Afkhami and Z. Barati**
The iterated line graphs of Cayley graphs associated to a commutative ring, pp.1-14

** A. Babai and M. Khatami**
NSE characterization of some Suzuki groups, pp.15-24

** L. Bussaban, A. Kaewkhao and S. Suantai**
Cayley graphs of gyrogroups, pp.25-32

** W.A. Dudek and R.A.R. Monzo**
Double magma associated with Ward and double Ward quasigroups, pp.33-52

** T. Foguel and J. Hiller**
On Bruck's prolongation and contraction maps, pp.53-62

** K. Hansda**
Minimal bi-ideals in regular and completely regular ordered semigroups, pp.63-72

** S.A. Khan, M.Y. Abbasi and Akbar Ali**
Covered lateral ideals of ordered ternary semigroups, pp.73-76

**
M. Khan and A. Khan**
Construction of mono-associative quasigroups, pp.77-80

**
S.K. Maity and R. Chatterjee**
b-lattice of nil-extensions of rectangular skew-rings, pp.81-90

**
S. Motamed and J. Moghaderi**
Some results on filters in residuated lattices, pp.91-105

**
P. Pornsurat and B. Pibaljommee**
Regularities in ordered ternary semigroups, pp.107-118

** S. Sadhya and K. Hansda**
Characterizations of pi-t-simple ordered semigroups by their ordered idempotents, pp.119-126

**
J. Sanborisoot**
On ordered semigroups without nilpotent ideals, pp.127-132

** H.B. Shelash and A.R, Ashrafi**
Computing maximal and minimal subgroups with respect to a given property in certain finite groups, pp.133-146

**
I. Shojaee, B. Tolue and A. Erfanian**
Some new approaches on prime and composite order Cayley graphs, pp.147-156

**
P. Summaprab**
On T

^{*}-pure ordered semigroups, pp.157-160

### vol.27 (2019) No. 2

**
M. Aaly Kologani, R.A. Borzooei and N. Kouhestani**
On (semi)topological hoops, pp.161-174

**
C.S. Anabanti**
A characterization of elementary abelian 3-groups, pp.175-180

**
M. Bakhshi and A. Radfar**
Characterization of obstinate H

_{v}MV-ideals, pp.181-200

**
J. Carr and M. Greer**
Complete graph decompositions and P-groupoids, pp.201-210

**
T.L. Clark**
Categorical equivalences in the theory of sharp transitivity, pp.211-226

**
E.V. Gorkunov, D.S. Krotov and V.N. Potapov**
On the number of autotopies of an n-ary quasigroup of order 4, pp.227-259

**
Kh. Keshvardoost**
Retractable finitely supported Cb-sets, pp.251-266

**
P. Luangchaisri and T. Changphas**
On (m,n)-regular and intra-regular ordered semigroups, pp.267-272

**
S.K. Maity, U. Kapuria and B. Mitra**
Congruences on nil-extension of a b-lattice of skew-rings, pp.273-280

**
N.N. Malyutina**
Cryptanalysis of some stream ciphers, pp.281-292

**
D.N. Moldovyan**
A unified method for setting finite non-commutative associative algebras and their properties, pp.293-308

**
T.K. Mondal**
Semirings which are distributive lattices of weakly left k-Archimedean semirings, pp.309-316

**
R. Padmanabhan and A. Shukla**
Means compatible with semigroup laws, pp.317-324