3Zhang J, Lu J, Zhao S, et al. Developing the Psychological Strain Scales(PSS) :reliability,validity, and preliminary hypothesis tests [J]. Social Indicators Research, 2014,115 ( 1 ) : 337 - 361.
4Zhang J, Wieczorek WE, Conwell Y, et al. Psychological strains and youth suicide in rural China[J]. Social Science : Medicine, 2011,72(12) : 2003 - 2010.