1[1]Alumin.Indicator Analysis For Commodity Derivatives[J/OL].http://www.indiainfoline.com/bisc/ari/comm.pdf.
2[2]john Cottingham,Robert Cropp and Randy Fortenbery.The Language Of Futures Markets And Options[J/OL].http://agmrketing extension.psu.edu/Commodity/PDFs/LanguageFut.pdf