Media type: E-Article Title: CrossRef Listing of Deleted DOIs Contributor: Pechousek, Jiri; Prochazka, Roman; Jancik, Dalibor; Mashlan, Miroslav Published: Test accounts, 2009 Published in: International Journal of Online Engineering (iJOE), 5 (2009) 5 Language: Without Specification DOI: 10.3991/ijoe.v5i5.944 ISSN: 1861-2121; 1868-1646 Keywords: General Engineering Origination: Footnote: Access State: Open Access