参考文献

Watkins, Clare; Romero-Martin, Maria Rosario; Moore, Kathryn G; Ritchie, James; Finn, Paul W; Kalvinsh, Ivars; Loza, Einars; Dikovska, Klara; Gailite, Vija; Vorona, Maxim; Piskunova, Irina; Starchenkov, Igor; Andrianov, Victor; Harris, C. John; Duffy, James E.S. Patent: US2004/77726 A1, 2004 ;