RUMMENY, E.*; EHRENHEIM, CH.†; GEHL, H. B.‡; HAMM, B.§; LANIADO, M.¶; LODEMANN, K. P.**; SCHMIEDEL, E.**; STEUDEL, A.†,†; VOGL, TH. G.‡,‡ Author Information
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Rummeny et al. (1991) studied this question.