From Alan Poon (Berkeley Lab) : https://drive.google.com/file/d/1XvdWeB_vCsEUJ8yGJqEehWpD3ETCaR-H/view

From Jeffrey Bramble : https://docs.google.com/document/d/1tyTN0zld8YS21lGjW6TfBdvv8BFpPcXMgVp_5__xff8/edit