Convexity Conditions for Generalized Riemann Derivable Functions
On the Property of Four Elements in Modular Spaces
Periodic Solutions for Second Order Differential Inclusions with Nonconvex and Unbounded Multifunction
P-Q-Metrizability of Bitopological Spaces with a Dual Base of Countable Order
A Generalized Measure Concentrated on a Closed Set of Measure Zero
Metrization and Semimetrization Theorems with Applications to Manifolds