authors.elsevier.com/sd/article/S...
authors.elsevier.com/sd/article/S...
doi.org/10.1016/j.fe...
doi.org/10.1016/j.fe...
www.ccfg.org.uk/wp-content/u...
www.ccfg.org.uk/wp-content/u...
authors.elsevier.com/sd/article/S...
authors.elsevier.com/sd/article/S...