| article html file updated | 6 February 2020 23:53 CET | Update | https://www.mdpi.com/2079-9721/3/4/253 |
| article html file updated | 6 May 2019 09:05 CEST | Update | N/A |
| article html file updated | 26 March 2019 12:47 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/2079-9721/3/4/253/xml |
| article pdf uploaded. | 16 October 2015 15:47 CEST | Version of Record | https://www.mdpi.com/2079-9721/3/4/253/pdf |
