Hirt, C. N., Y. Karlen, F. Suter, and K. Maag Merki. “Types of Social Help-Seeking Strategies in Different and across Specific Task Stages of a Real, Challenging Long-Term Task and Their Role in Academic Achievement”. Frontline Learning Research, vol. 8, no. 4, Aug. 2020, pp. 74-111, doi:10.14786/flr.v8i4.627.