Resilience scales:
Connor, K. M., & Davidson, J. R. (2003). Development of a new resilience scale: The Connor‐Davidson resilience scale (CD‐RISC). Depression and anxiety, 18(2), 76-82.
Liebenberg, L., Ungar, M., & Vijver, F. V. D. (2012). Validation of the child and youth resilience measure-28 (CYRM-28) among Canadian youth. Research on social work practice, 22(2), 219-226.
Goodman, R. (1997). The Strengths and Difficulties Questionnaire: a research note. Journal of child psychology and psychiatry, 38(5), 581-586. (specifically the emotional symptoms questions)