Freilinger, Gerhard; Gruber, Helmut; Happak, Wolfgang; Pechmann, Ursula (November 1987). "Surgical Anatomy of the Mimic Muscle System and the Facial Nerve: Importance for Reconstructive and Aesthetic Surgery". Plastic and Reconstructive Surgery. 80 (5): 686–690. doi:10.1097/00006534-198711000-00005. PMID3671560. S2CID7292843.
Freilinger, Gerhard; Gruber, Helmut; Happak, Wolfgang; Pechmann, Ursula (November 1987). "Surgical Anatomy of the Mimic Muscle System and the Facial Nerve: Importance for Reconstructive and Aesthetic Surgery". Plastic and Reconstructive Surgery. 80 (5): 686–690. doi:10.1097/00006534-198711000-00005. PMID3671560. S2CID7292843.
Freilinger, Gerhard; Gruber, Helmut; Happak, Wolfgang; Pechmann, Ursula (November 1987). "Surgical Anatomy of the Mimic Muscle System and the Facial Nerve: Importance for Reconstructive and Aesthetic Surgery". Plastic and Reconstructive Surgery. 80 (5): 686–690. doi:10.1097/00006534-198711000-00005. PMID3671560. S2CID7292843.