《氢与燃料电池通讯》(The Hydrogen & Fuel Cell Letter)编辑、《永恒燃料:氢的故事》(The Forever Fuel: The Story of Hydrogen)作者霍夫曼记述了氢能在全世界范围内从小众市场发展为可行的商业产品的进程。——《图书馆杂志》(Library Journal)
"Editor of The Hydrogen & Fuel Cell Letter and author of The Forever Fuel: The Story of Hydrogen, Hoffmann chronicles the worldwide progression of hydrogen energy from a niche market to a viable commercial product." -Library Journal