1990/37/3-4
On a problem of G. O. H. Katona
Á. Varecza
Almost additive functions on Ehresmann groupoids
Janusz Baster
Lattice ordered rings
S. A Todorinov and St. G. Teneva
On asymptotic distribution modulo a subdivision
P. Kiss and R. F. Tichy
Boundedness, convergence and global stability of solutions of a nonlinear differential equation of the second order
Štefan Kulcsár
On certain properties of centralizers hereditary to the factor group
Keresztély Corrádi
Resolutions and infinite-dimensionality
Ivan Lončar
Characterization of pairs of additive functions with some regularity property
Z. Daróczy and I. Kátai
Radicals of $\Gamma$-near-rings
G. L. Booth
Samoin'ektivnye skreshchennye proizvedenija grupp i kolec
S. V. Mihovski
The period length of Voronoi's algorithm for certain cubic orders
H. C. Williams
A result on the neutrix convolution product of distributions
Brian Fisher
$\pi$-holomorphically planar curves and $\pi$-holomorphically projective transformations
Georgy Markov and Mileva Prvanović
On Darboux points and the property of Świątkowski of transformations with closed graphs
Helena Pawlak and Ryszard Jerzy Pawlak
On realizations of Fourier series operators
Jouko Tervo
On the differentiability of loopmultiplication in canonical coordinate-system
J. Kozma
Products of cyclic permutations
Gerhard Behrendt
Existence of maximal elements and equilibria
G. Mehta and E. Tarafdar
Stepeni neprivodimyh harakterov i normal'noe stroenie konechnyh grupp
Ja. G. Berkovich
K teoremam Gallahera o nuljah gruppovyh harakterov
E. M. Zhmud'
Shaky polyhedra of higher connection
Walter Wunderlich
