Faraone 1987 # Faraone 1990 # Ferrini F. 1978 # Groeschel 1986 # Gumtz 1982 # Hoffmann 1978 # Hurst 1976 # Knobloch 1978 # Malinauskene 1987 # Raubitschek A. 1992 # Roussel 1990 # Sinatra F. 1980 #