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Trott GE, Menzel M, Friese HJ, Nissen G.Trott GE, et al. Among authors: nissen g.Z Kinder Jugendpsychiatr. 1991 Dec;19(4):248-53.Z Kinder Jugendpsychiatr. 1991.PMID: 1812674Clinical Trial.German.
Friese HJ, Nissen G.Friese HJ, et al. Among authors: nissen g.Krankenpfl J. 1984 Jan-Feb;22(1-2):4-7.Krankenpfl J. 1984.PMID: 6560124German.No abstract available.