One basic element of publication ethics requires that an author give proper credit to those who contributed to the research. There are two ways to violate this guideline: not giving enough credit and giving too much credit.
Too little credit:
Researchers are often accused of claiming more credit than they deserve for a notable research result. Claiming a breakthrough without acknowledging previous work leading up to it is quite common in the history of science and has led to some famous controversies over priority. In fact, Lavoisier may not have been the “Father of Chemistry” so much as the gifted pupil of several other researchers.