Simultaneous or successive publishing of selfsame or near- selfsame
material in
two or more various sources
without acknowledgment. It differs from reprinted publication in that a reprint cites sources. It differs from
plagiarism in that
duplicate publication is the product of the
same authorship while plagiarism publishes a
work or parts of a
work of other as one's own.
The designation
given an
article or
book of selfsame or almost selfsame
material published simultaneously or successively with the
material previously published elsewhere,
without acknowledgment.