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Spencer PS, Ludolph AC, Kisby GE.Spencer PS, et al.Ann N Y Acad Sci. 1992 May 11;648:154-60. doi: 10.1111/j.1749-6632.1992.tb24533.x.Ann N Y Acad Sci. 1992.PMID: 1322079Review.
Riepe M, Hori N, Ludolph AC, Carpenter DO, Spencer PS, Allen CN.Riepe M, et al. Among authors: spencer ps.Brain Res. 1992 Jul 17;586(1):61-6. doi: 10.1016/0006-8993(92)91371-k.Brain Res. 1992.PMID: 1355004
Ludolph AC, Seelig M, Ludolph AG, Sabri MI, Spencer PS.Ludolph AC, et al. Among authors: spencer ps.Ann N Y Acad Sci. 1992 May 11;648:300-2. doi: 10.1111/j.1749-6632.1992.tb24562.x.Ann N Y Acad Sci. 1992.PMID: 1637059No abstract available.