1991/39/3-4
On the geometry of generalized metric spaces. II. Spaces of isotropic curvature
Hideo Izumi and Mamoru Yoshida
On the classification of nilpotent Lie algebras of maximal rank
M. K. Prisco
Cauchy and Jensen equations on a restricted domain almost everywhere
Józef Tabor
On extrinsic spheres in Kähler manifolds
Czesław Konopka
Finsler connection transformations associated to a general Finsler metrical structure of Miron type. II.
Petre Stavre and Francisc C. Klepp
Equation solving iterations based on tangential convex functions
Magdolna Várterész
On $k$-Lagrange geometry
Magdalen Sz. Kirkovits
Notes on topological properties of $\phi (L)$ spaces ＜a href="https://library.math.unideb.hu/10_5486_1991_39_3_4_08_abstract.pdf" target="_blank"＞(abstract)＜/a＞
Danuta Stachowiak
On a fixed point theorem of Greguš, Jr. ＜a href="https://library.math.unideb.hu/10_5486_1991_39_3_4_09_abstract.html" target="_blank"＞(abstract)＜/a＞
Michal Zajac
On a functional equation characterizing inner product spaces
C. Alsina and J. L. Garcia Roig
Interval-filling sequences of order $N$ and a representation of real numbers in canonical number systems
B. Kovács and Gy. Maksa
Normal locally conformal almost cosymplectic manifolds
Zbigniew Olszak and Radu Roşca
On a Stamate-type functional equation
Marek Kuczma
Estimate of the rate of mean convergence of Hermite interpolating processes
S. Szabó
On ball-filling vector sequences in $\mathbf{R}^N$
I. Joó
On the difference of integer-valued additive functions
I. Z. Ruzsa and R. Tijdeman