On 2016 Feb 01, Morten Oksvold commented:

Please note that this article is 1 out of 15 publications for which an independent investigation initiated by the University of Copenhagen has found suspicion of scientific dishonesty. The conclusion from the report was published July 23, 2012:

http://news.ku.dk/all_news/2012/2012.8/indications_of_fraud_in_penkowas_early_research/

This articles should therefore not be cited.

On 2016 Feb 01, Morten Oksvold commented:

Please note that this article is 1 out of 15 publications for which an independent investigation initiated by the University of Copenhagen has found suspicion of scientific dishonesty. The conclusion from the report was published July 23, 2012:

http://news.ku.dk/all_news/2012/2012.8/indications_of_fraud_in_penkowas_early_research/

This articles should therefore not be cited.