Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Chaochao Fan and Gang Yan and Jianlin Yu,Theoretical study on a modified heat pump cycle with zeotropic mixture R32/R290 for district heating in cold region,Applied Thermal Engineering,1359-4311,Elsevier BV,2019-06,156,,702-707,https://cir.nii.ac.jp/crid/1363670318379891328,https://doi.org/10.1016/j.applthermaleng.2019.04.112