V. H.  Gonzalez and Giraldo, C., ?NEW ANDEAN BEE SPECIES OF CHILICOLA SPINOLA (HYMENOPTERA: COLLETIDAE, XEROMELISSINAE) WITH NOTES ON THEIR BIOLOGY?, Caldasia, vol. 31, 2009.

M. S.  Engel and Gonzalez, V. H., ?A NEW SPECIES OF CHLEROGAS FROM THE ANDES OF CENTRAL COLOMBIA (HYMENOPTERA: HALICTIDAE)?, Caldasia, vol. 31, 2009.

V. H.  Gonzalez, Gonzalez, M. M., and Cuellar, Y., ?Notas biológicas y taxonómicas sobre los abejorros del maracuyá del género Xylocopa (Hymenoptera: Apidae, Xylocopini) en Colombia?, Acta Biologica Colombiana, vol. 14, 2009.

A.  Smith-Pardo and Gonzalez, V. H., ?A revision of Neocorynura bees of the joannisi group with new geographical records for other Andean species (Hymenoptera: Halictidae, Augochlorini)?, Studies on Neotropical Fauna and Environment, vol. 44, 2009.