Higher prevalence of voice disorders in patients with cleft lip and palate? results from two studies. - Tim Bressmann; Robert Sader; Wolfram Ziegler; Shaheen Awan; Michael Merk; Hans-Florian Zeilhofer; Hans-Henning Horch (MAVEBA, 1999)

Acoustic assessment of neurogenic voice disorders in a clinical setting. - Michael Merk; Wolfram Ziegler; Bettina Brendel (MAVEBA, 1999)