1. S. Dimopoulos and H. Georgi, Softly broken supersymmetry and SU(5), Nucl. Phys. B 193 (1981) 150 [ INSPIRE ].
2. J.L. Chkareuli and I.G. Gogoladze, Unification picture in minimal supersymmetric SU(5) model with string remnants, Phys. Rev. D 58 (1998) 055011 [ hep-ph/9803335 ] [ INSPIRE ].
3. B. Bajc, P. Fileviez Perez and G. Senjanović, Proton decay in minimal supersymmetric SU(5), Phys. Rev. D 66 (2002) 075005 [ hep-ph/0204311 ] [ INSPIRE ].
4. B. Bajc, P. Fileviez Perez and G. Senjanović, Minimal supersymmetric SU(5) theory and proton decay: where do we stand?, hep-ph/0210374 [ INSPIRE ].
5. C. Bachas, C. Fabre and T. Yanagida, Natural gauge coupling unification at the string scale, Phys. Lett. B 370 (1996) 49 [ hep-th/9510094 ] [ INSPIRE ].