| article html file updated | 6 February 2020 17:45 CET | Update | https://www.mdpi.com/2079-9268/5/2/57 |
| article html file updated | 6 May 2019 21:46 CEST | Update | N/A |
| article html file updated | 26 March 2019 00:49 CET | Update | N/A |
| article html file updated | 5 November 2015 08:20 CET | Original file | N/A |
| article xml file uploaded | 5 November 2015 08:20 CET | Original file | https://www.mdpi.com/2079-9268/5/2/57/xml |
| article pdf uploaded. | 20 April 2015 11:14 CEST | Updated version of record | https://www.mdpi.com/2079-9268/5/2/57/pdf |
| article pdf uploaded. | 17 April 2015 10:00 CEST | Version of Record | https://www.mdpi.com/2079-9268/5/2/57/pdf-vor |
