https://www.sciencedirect.com/science/article/pii/S009457651830119X?casa_token=COuK0IWz_aIAAAAA:IoCciW_lHOk6exFIxRD7-32qXtwLqPVA5_aEzL1EkQTxpPST7wmltNUiDNqAIOdeAEtmHS1mHtBh 2018 General Medium
https://www.sciencedirect.com/science/article/pii/S009457651830119X?casa_token=COuK0IWz_aIAAAAA:IoCciW_lHOk6exFIxRD7-32qXtwLqPVA5_aEzL1EkQTxpPST7wmltNUiDNqAIOdeAEtmHS1mHtBh 2018 General Medium