Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Matthew R McGrail,Spatial accessibility of primary health care utilising the two step floating catchment area method: an assessment of recent improvements,International Journal of Health Geographics,1476-072X,Springer Science and Business Media LLC,2012,11,1,50,https://cir.nii.ac.jp/crid/1362544418452030976,https://doi.org/10.1186/1476-072x-11-50