Submission of an article implies that the work described has not been published previously, that it is not under consideration for publication elsewhere, that its publication is approved by all authors and tacitly or explicitly by the responsible authorities where the work was carried out, and that, if accepted, it will not be published elsewhere in the same form, in English or in any other language, including electronically without the written consent of the copyright-holder.

To be more familiar with concepts and examples of scientific fraud, authors may visit the following links:

http://www.cse.msu.edu/~alexliu/plagiarism.pdf
http://www.ethics.elsevier.com/pdf/ETHICS_PLA01a.pdf
http://www.elsevier.com/reviewers/reviewers-update/archive/issue-2/a-question-of-ethics-plagiarism-and-ethical-infringement-in-publishing