Classification
PBBC - Relativistic quantum mechanics
36
PKKA - Quantum field theory
7
PBA - Quantum theory
6
PKK - Theory of fields and particles - general
5
PKA - Elementary particles, nuclei - general
3
PBG - Relativity, gravitation
2
PKJ - Quantum electrodynamics
2
PBB - Quantum theory - special methods
1
THC - Engineering mechanics and dynamics
1