Study of approximations in the nuclear pairing-force problem

Exact and approximate solutions of the nuclear pairing problem

The nuclear pairing problem: new perspectives

On a collective pair approximation for low-energy nuclear spectra

Functional approach to nuclear field theory: A schematic model with pairing and particle-hole forces

Thermo field dynamics in the treatment of the nuclear pairing problem at finite temperature

Number-conserving approach to the pairing-force problem