I believe the paper they're responding to is this one: http://www.greenenergyhelps.com/wp-content/uploads/2013/04/Wolverton-et-al-1984.pdf http://www.greenenerg

I believe the paper they're responding to is this one: http://www.greenenergyhelps.com/wp-content/uploads/2013/04/Wolverton-et-al-1984.pdf http://www.greenenergyhelps.com/wp-content/uploads/2013/04/W...