Provatidis, Christopher (2013). Simplified biomechanics for a possible explanation of the ancient Greek long jump using halteres. Universal Journal of Engineering Science, Vol.1, No.1, pp. 5-16, July 2013.
Open Access, Online at: http://www.hrpub.org/download/201307/ujes.2013.010102.pdf.
Provatidis, Christopher (2010). Some issues on inertia propulsion mechanisms using two contra-rotating masses. Theory of Mechanisms and Machines, Vol.8, Iss.1, pp. 34-41 (ISSN 2079-021X); direct link: http://tmm.spbstu.ru/15/Provatidis_15.pdfΑρχειοθετήθηκε 2011-08-31 στο Wayback Machine.
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Provatidis, Christopher (2010). Some issues on inertia propulsion mechanisms using two contra-rotating masses. Theory of Mechanisms and Machines, Vol.8, Iss.1, pp. 34-41 (ISSN 2079-021X); direct link: http://tmm.spbstu.ru/15/Provatidis_15.pdfΑρχειοθετήθηκε 2011-08-31 στο Wayback Machine.