1. What problems of physics and astrophysics seem now to be especially important and interesting (thirty years later, already on the verge of XXI century)?;Ginzburg;Physics- Uspekhi,1999
2. An empirical mass spectrum of elementary particles;Nambu;Prog. Theor. Phys.,1952
3. Lepton mass formula;Barut;Phys. Rev. Lett.,1979
4. New view of quark and lepton mass hierarchy;Koide;Physical Review D,1983
5. Mass quantization and lorentz group;Varlamov;Mathematical Structures and Modeling,2017