| article html file updated | 6 February 2020 02:19 CET | Update | https://www.mdpi.com/2076-3425/3/2/821 |
| article html file updated | 8 May 2019 04:44 CEST | Update | N/A |
| article html file updated | 20 March 2019 22:59 CET | Update | N/A |
| article html file updated | 17 June 2015 09:40 CEST | Update | N/A |
| article html file updated | 20 May 2014 08:37 CEST | Original file | N/A |
| article xml file uploaded | 20 May 2014 08:37 CEST | Original file | https://www.mdpi.com/2076-3425/3/2/821/xml |
| article pdf uploaded. | 24 May 2013 17:02 CEST | Version of Record | https://www.mdpi.com/2076-3425/3/2/821/pdf |
