Calina, Niki Adrian, Cristian Filip, Daniel Serban, Marius Podea, Costica Zamfir, Gheorghe Checiu, Morosanu Eduard, and Florin Exergian. 2016. “Chordomas, Malignant Spinal Tumors: A 15-Year Experience”. Romanian Neurosurgery 30 (1):15-27. https://journals.lapub.co.uk/index.php/roneurosurgery/article/view/868.