Member of the Group of Mathematical Physics of the University of Lisbon.
- Paper "Periodical plane puzzles with numbers" [PDF]
- Paper "Jogos com poliedros e permutações" [PDF]
-- published in Boletim da SPM (43), October 2000.
- Paper "Sobre os puzzles com poliedros e números" [PDF]
english version: "On the Puzzles with polyhedra and numbers" [PDF]
- Paper "Puzzles with polyhedra and permutation groups" [PDF]
- Paper "Three puzzles with polyhedra and numbers" [PDF]
- More puzzles [PDF]:
- Paper "Polyhedron puzzles and groups" [PDF]
- Photos of polyhedron puzzles
- Polyhedra and numbers
- Home page at ludicum.org
- Paper "The Sturm-Liouville problem and the Polar Representation Theorem"
- Paper "Period and energy in one degree of freedom systems" [PDF]
- Ruy Luís Gomes Centenary
- Feynman path integrals
- Stationary phase method
- Semi-classical aproximation in quantum mechanics
- Schrödinger operators
- Borel summability