P. Gjessing

Three-dimensional Evaluation of Dentoskeletal Changes after Posterior Cross-bite Correction by Quad-Helix or Removable Appliances

A. Athanasiou, B. Boysen, K. La Cour, 1992, British journal of orthodontics.

Endoscopic full-thickness dissection (EFTD) in the rectum: a case series

S. Steigen, T. Dehli, M. Nordbø, 2021, Techniques in Coloproctology.

Biomechanical design and clinical evaluation of a new canine-retraction spring.

P Gjessing, P. Gjessing, 1985, American journal of orthodontics.

Controlled retraction of maxillary incisors.

P. Gjessing, 1992, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

Electronic determination of centres of rotation produced by orthodontic force systems.

E Pedersen, K Andersen, P E Gjessing, 1990, European journal of orthodontics.