10.3119/04-10.1
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10.3119/08-5.1
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10.3119/08-32.1
10.3119/11-07
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10.3119/13-10
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10.3119/0035-4902(2006)108[249:VFOINW]2.0.CO;2
10.3119/0035-4902(2007)109[197:UFVOTO]2.0.CO;2
10.3119/0035-4902(2007)109[415:COMVIO]2.0.CO;2