- Koroνessis, M. Pfeiffer, P. Griss, A. Baikousis, M. Stamatakis, G. Petsinis: Short-term results after posterior spinal fusion with Dorsan Dynamic Spondylodesis System (DDS). 2nd combined meeting European Spine Society – European Spinal deformities, Innsbruck, Austria, June 23-27, 1998.
- Korovessis, A. Baikousis, G. Petsinis, Z. Papazisis : Effects of thoracolumbosacral orthosis (TLSO) on spinal deformities, trunk asymmetry and frontal lower rib cage in adolescent idiopathic scoliosis. 2nd Annual meeting of the spine society of Europe, Antwerp, October 10-14, 2000.
- Korovessis, A. Baikousis, G. Petsinis, Z. Papazisis : Posterior compact Cotrel-Dubousset (CCD) instrumentation for occipitocervical, cervical and cervicothoracic fusion. 3rd Annual meeting of the spine society of Europe, Gothenburg, September 4-8, 2001.
- Korovessis, Z. Papazisis, G. Petsinis, A. Baikousis : Prediction of thoracic kyphosis with the use of the Debrunner’s kyphometer. 3rd Annual meeting of the spine society of Europe, Gothenburg, September 4-8, 2001.
- Korovessis, G. Petsinis, M. Repantti : Successful implantation and course of Zweymueller-SL metal-on-metal total hip arthroplasty. 6th Congress of the European Federation of National Associations of Orthopaedics and Traumatology EFORT, Helsinki Fair Centre, Finland, June 4-10, 2003.
- Korovessis P., Baikousis , Zacharatos S., Petsinis G., Koureas G., Iliopoulos P. : Combined anterior plus posterior stabilization vs. Posterior stabilization and fusion in the treatment of lumbar burst fractures. 7th EFORT Congress, Lisbon, Portugal, 4-7 June, 2005.
- Petsinis, S. Zacharatos, P. Korovessis: Radiographic and clinical results of balloon kyphoplasty for the treatment of pathologic vertebral compression fractures. 10th International Argos Symposium, Paris, France, 26-27 January, 2006.
