Reference:

Katri Huitu, Yoshiharu Kawamura, Tatsuo Kobayashi, and Kai Puolamäki. Generic gravitational corrections to gauge couplings in SUSY GUTs. Physics Letters B, 468(1–2):111–117, 1999.

Suggested BibTeX entry:

@article{Huitu99plb1,
    author = {Katri Huitu and Yoshiharu Kawamura and Tatsuo Kobayashi and Kai Puolam\"aki},
    journal = {Physics Letters B},
    number = {1--2},
    pages = {111--117},
    title = {Generic gravitational corrections to gauge couplings in {SUSY} $SU(5)$ {GUT}s},
    volume = {468},
    year = {1999},
}