Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Fengnan Liu and Yasuhide Fukumoto and Xiaopeng Zhao,A multi level linearized Crank–Nicolson scheme for Richards equation under variable flux boundary conditions,Applicable Analysis,0003-6811,Informa UK Limited,2021-10-21,102,6,1601-1617,https://cir.nii.ac.jp/crid/1360294643774023424,https://doi.org/10.1080/00036811.2021.1992395