https://www.tandfonline.com/doi/pdf/10.1080/0952813X.2017.1354081?casa_token=g9z66Yi-ngwAAAAA:FI1HEL8E3NCeAcG_Bp2QP2Ui2Xi_ujzwFqbRGbR8bnzAkKMpQw2lVMc_lwVglWZZXeyCrLsitUEKPBA 2017 Technology Low