Malone, S. ., Keller, P. ., Hammerslag, L. ., & Bardo, M. . (2021). Escalation and reinstatement of fentanyl self-administration in male and female rats. Psychopharmacology, 238(8), 2261-2273. https://doi.org/10.1007/s00213-021-05850-7

Bardo, M. ., Hammerslag, L. ., & Malone, S. . (2021). Effect of early life social adversity on drug abuse vulnerability: Focus on corticotropin-releasing factor and oxytocin. Neuropharmacology, 191, 108567. https://doi.org/10.1016/j.neuropharm.2021.108567 (Original work published 2021)

Hammerslag, L. ., Humburg, B. ., Malone, S. ., Beckmann, J. ., Saatman, K. ., , & Bardo, M. . (2022). Peer-induced cocaine seeking in rats: Comparison to nonsocial stimuli and role of paraventricular hypothalamic oxytocin neurons. Addiction Biology, 27(5), e13217. https://doi.org/10.1111/adb.13217

Malone, S. ., Shaykin, J. ., Stairs, D. ., & Bardo, M. . (2022). Neurobehavioral effects of environmental enrichment and drug abuse vulnerability: An updated review. Pharmacology, Biochemistry, and Behavior, 173471. https://doi.org/10.1016/j.pbb.2022.173471 (Original work published 2022)