CRUZ-MORALES, S. E., M. R. GONZÁLEZ-REYES, J. G. GÓMEZ-ROMERO, and J. C. P. ARRIAGA RAMÍREZ. “Anxiety Models”. Mexican Journal of Behavior Analysis, vol. 29, no. 1, Jan. 2011, pp. 93-105, doi:10.5514/rmac.v29.i1.23518.