A Formal Proof of Euler's Polyhedron Formula (PDF)
Two Formal Approaches to Rough Sets (PDF)
Improving Representation of Knowledge within the Mizar Library (PDF)
A Language for Mathematical Knowledge Management (PDF)
How to Define Terms in Mizar Effectively (PDF)
Enhanced Processing of Adjectives in Mizar (PDF)
The Chinese Remainder Theorem, its Proofs and its Generalizations in Mathematical Repositories (PDF)
Combining Mizar and TPTP Semantic Presentation and Verification Tools (PDF)