Reliability,Validity and Applicability of the Chinese Version of the Psychological Need Satisfaction in Exercise Scale for the Elderly 
LIU Lei,LIU Huaping,GUO Hong,SUN Zhe,ZHONG Lili,LI Xiaoxue
Chinese General Practice . 2021, (5): 619 -624 .  DOI: 10.12114/j.issn.1007-9572.2020.00.459