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DOE:10.5254/1.3536244
DOE:10.5254/1.3536245
DOE:10.5254/1.3538722
DOE:10.5254/1.3547590
DOE:10.5254/1.3547613
DOE:10.5254/1.3547646
DOE:10.5254/rct.14.85930
DOE:10.5254/rct.14.87913