1. Lecture Notes in Artificial Intelligence;F. Baader,2003
2. Toma, C.: A connection between special relativity and quantum theory based on non-commutative properties and system - wave interaction. Balkan Physics Letters Supplement 5, 2509–2513 (1997)
3. Lecture Notes in Artificial Intelligence;M. Takeda,2003
4. Toma, C.: The advantages of presenting special relativity using modern concepts. Balkan Physics Letters Supplement 5, 2334–2337 (1997)
5. Cattani, C.: Harmonic Wavelets towards Solution of Nonlinear PDE. Computers and Mathematics with Applications 50, 1191–1210 (2005)