| article html file updated | 6 February 2020 23:57 CET | Update | https://www.mdpi.com/2073-4433/6/10/1521 |
| article html file updated | 6 May 2019 08:57 CEST | Update | N/A |
| article html file updated | 26 March 2019 12:54 CET | Update | N/A |
| article html file updated | 2 November 2015 10:51 CET | Original file | N/A |
| article xml file uploaded | 2 November 2015 10:51 CET | Original file | https://www.mdpi.com/2073-4433/6/10/1521/xml |
| article pdf uploaded. | 20 October 2015 11:04 CEST | Version of Record | https://www.mdpi.com/2073-4433/6/10/1521/pdf |
