| article html file updated | 6 February 2020 01:31 CET | Update | https://www.mdpi.com/2076-3425/3/2/521 |
| article html file updated | 8 May 2019 06:17 CEST | Update | - |
| article html file updated | 20 March 2019 21:00 CET | Update | - |
| article html file updated | 17 June 2015 08:25 CEST | Update | - |
| article html file updated | 20 May 2014 08:36 CEST | Original file | - |
| article xml file uploaded | 20 May 2014 08:36 CEST | Original file | https://www.mdpi.com/2076-3425/3/2/521/xml |
| article pdf uploaded. | 12 April 2013 16:25 CEST | Version of Record | https://www.mdpi.com/2076-3425/3/2/521/pdf |
