Plagiarism occurs when an author takes ideas, information, or words from another source without proper credit to the source. Even when it occurs unintentionally, plagiarism is still a serious academic violation and unacceptable in academic publications.
The author takes words from another author, a citation and quotation marks are required. Whenever four or more consecutive words are identical to a source that the author has read, the author must use quotation marks to denote the use of another author's original words; just a citation is no longer enough.
Multiple, Redundant or Concurrent Publication. An author should not in general publish manuscripts describing essentially the same research in more than one journal or primary publication. Submitting the same manuscript to more than one journal concurrently constitutes unethical publishing behavior and is unacceptable.