H Garcia-Compean, O Obregon, C Ramirez

Physical review letters 88 (16), 161301, 2002

H Garcia-Compean, O Obregon, C Ramirez, M Sabido

Physical Review D 68 (4), 044015, 2003

PD D'eath, SW Hawking, O Obregón

Physics Letters B 300 (1-2), 44-48, 1993

A Macias, O Obregon, MP Ryan Jr

Classical and Quantum Gravity 4 (6), 1477, 1987

JC Lopez-Dominguez, O Obregon, M Sabido, C Ramirez

Physical Review D—Particles, Fields, Gravitation, and Cosmology 74 (8), 084024, 2006

S Nojiri, O Obregon, SD Odintsov

Physical Review D 62 (10), 104003, 2000

H Garcia-Compean, O Obregon, C Ramirez, M Sabido

Physical Review D 68 (4), 045010, 2003

H Dehnen, O Obregón

Astrophysics and Space Science 14, 454-459, 1971

D Armand-Ugon, R Gambini, O Obregón, J Pullin

Nuclear Physics B 460 (3), 615-631, 1996

JA Nieto, O Obregón, J Socorro

Physical Review D 50 (6), R3583, 1994

S Nojiri, O Obregon, SD Odintsov, KE Osetrin

Physics Letters B 458 (1), 19-28, 1999

S Nojiri, O Obregon, SD Odintsov, KE Osetrin

Physics Letters B 449 (3-4), 173-179, 1999

R Gambini, O Obregon, J Pullin

Physical Review D 59 (4), 047505, 1999

O Obregón, JJ Rosales, VI Tkach

Physical Review D 53 (4), R1750, 1996

O Obregón, C Ramirez

Physical Review D 57 (2), 1015, 1998

S Nojiri, O Obregon, SD Odintsov, H Quevedo, MP Ryan

Modern Physics Letters A 16 (18), 1181-1192, 2001

VI Tkach, JJ Rosales, O Obregón

Classical and Quantum Gravity 13 (9), 2349, 1996

S Nojiri, O Obregon, SD Odintsov, S Ogushi

Physical Review D 62 (6), 064017, 2000

JA Nieto, J Socorro, O Obregon

Physical review letters 76 (19), 3482, 1996

O Obregón, JJ Rosales, J Socorro, VI Tkach

Classical and quantum gravity 16 (9), 2861, 1999