Classification
PKC - Elementary particles, nuclei - general theory
12
PKKG - Gauge field theory
8
PKA - Elementary particles, nuclei - general
5
PKB - Elementary particles, nuclei - comprehensive works
4
PKJ - Quantum electrodynamics
4
PKKA - Quantum field theory
3
PKL - Elementary particles - interactions, reactions, resonances
3
PKLB - Elementary particles - specific theories, interaction models
2