A former professor at Amsterdam’s VU university published at least 61 pieces of faked research over a 15-year period, the Volkskrant reports on Monday.

Mart Bax, who retired in 2002, was involved in fraud for at least 15 years, publishing invented research, recycling his work under other names and lying about awards and other work, the Volkskrant says.

The university is not taking any legal steps against Bax, a political anthropologist, because he stopped working 11 years ago. The results of a formal investigation into Bax will be published later on Monday.

In 2011, Tilburg professor Diederik Stapel was sacked after it emerged he had faked research data in at least 30 scientific papers.