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Nielsen, Susan Searles, Harvey Checkoway, Susan R. Criswell, Federico M. Farin, Patricia L. Stapleton, Lianne Sheppard, ja Brad A. Racette. "Inducible Nitric Oxide Synthase Gene Methylation and Parkinsonism in Manganese-exposed Welders." Parkinsonism Relat Disord 2015.

Nielsen, Susan Searles, et al. "Inducible Nitric Oxide Synthase Gene Methylation and Parkinsonism in Manganese-exposed Welders." Parkinsonism Relat Disord 2015.