https://www.sciencedirect.com/science/article/pii/S0094576516309389?casa_token=pqlAa5xHGp0AAAAA:7XDhflArt7IW5ZEsbxLBPJlwcPV4Zs5JIIosbfmdJhvw5oM3hedL9DvtGOmkmRLP8KMi38r1O0QJ 2016 Natural and cosmic Low
https://www.sciencedirect.com/science/article/pii/S0094576516309389?casa_token=pqlAa5xHGp0AAAAA:7XDhflArt7IW5ZEsbxLBPJlwcPV4Zs5JIIosbfmdJhvw5oM3hedL9DvtGOmkmRLP8KMi38r1O0QJ 2016 Natural and cosmic Low