1. Proton stability in grand unified theories, in strings and in branes;Nath;Phys. Rept.,2007
2. Nishino, H. et al. [Super-Kamiokande] (2009). Search for Proton Decay via p —> e+ pi0 and p —> mu+ pi0 in a Large Water Cherenkov Detector. Phys. Rev. Lett., 102, 141801.
3. Workman, R.L. et al. [Particle Data Group] (2022). Review of Particle Physics. PTEP, 2022, 083C01.
4. Colloquium: The neutron lifetime;Wietfeldt;Rev. Mod. Phys.,2011
5. Measuring neutron lifetime by storing ultracold neutrons and detecting inelastically scattered neutrons;Mampe;JETP Lett.,1993