| article html file updated | 6 February 2020 08:11 CET | Update | https://www.mdpi.com/2076-3425/4/2/220 |
| article html file updated | 7 May 2019 16:46 CEST | Update | N/A |
| article html file updated | 21 March 2019 14:32 CET | Update | N/A |
| article html file updated | 20 August 2015 01:06 CEST | Update | N/A |
| article html file updated | 18 July 2014 03:57 CEST | Original file | N/A |
| article xml file uploaded | 18 July 2014 03:57 CEST | Original file | https://www.mdpi.com/2076-3425/4/2/220/xml |
| article pdf uploaded. | 26 March 2014 09:37 CET | Version of Record | https://www.mdpi.com/2076-3425/4/2/220/pdf |
