参考文献

Wittenberger, Steven J.; Bhagavatula, Lakshmi; DeGoey, David A.; DeMattei, John; Gupta, Ashok K.; Hill, David R.; Manna, Sukumar; McLaughlin, Maureen Ann; Nichols, Paul J.; Ramiya, Premchandran H.; Rasmussen, Michael W.; Tian, Zhenping Patent: US2003/55297 A1, 2003 ;