by Carver, A C, Vickrey, B G, Bernat, J L, Keran, C, Ringel, S P, Foley, K M
Published in Neurology (22.07.1999)

by Sanjak, M, Brinkmann, J, Belden, D.S, Roelke, K, Waclawik, A, Neville, H.E, Ringel, S.P, Murphy, J.R, Brooks, B.R
Published in Journal of the neurological sciences (15.10.2001)

by Ringel, S P, Vickrey, B G, Keran, C M, Bieber, J, Bradley, W G
Published in Neurology (25.01.2000)

by Holloway, R G, Ringel, S P, Bernat, J L, Keran, C M, Lawyer, B L
Published in Neurology (28.11.2000)

by Guggenheim, M A, Ringel, S P, Silverman, A, Grabert, B E, Neville, H E
Published in Annals of the New York Academy of Sciences (01.01.1982)

by Ringel, S.P., Klawans, H.L.
Published in Journal of the neurological sciences (01.07.1972)

by Klawans, Jr, H L, Ringel, S P
Published in European neurology (1971)