| article html file updated | 6 February 2020 05:15 CET | Update | https://www.mdpi.com/2075-4450/4/4/593 |
| article html file updated | 7 May 2019 22:40 CEST | Update | N/A |
| article html file updated | 21 March 2019 06:54 CET | Update | N/A |
| article html file updated | 27 January 2015 07:08 CET | Original file | N/A |
| article xml file uploaded | 27 January 2015 07:08 CET | Original file | https://www.mdpi.com/2075-4450/4/4/593/xml |
| article pdf uploaded. | 30 October 2013 14:43 CET | Version of Record | https://www.mdpi.com/2075-4450/4/4/593/pdf |
