| article html file updated | 6 February 2020 01:25 CET | Update | https://www.mdpi.com/2076-3425/3/2/460 |
| article html file updated | 8 May 2019 06:29 CEST | Update | - |
| article html file updated | 20 March 2019 20:45 CET | Update | - |
| article html file updated | 17 June 2015 08:14 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/2076-3425/3/2/460/xml |
| article pdf uploaded. | 9 April 2013 16:06 CEST | Updated version of record | https://www.mdpi.com/2076-3425/3/2/460/pdf |
| article pdf uploaded. | 8 April 2013 16:15 CEST | Version of Record | https://www.mdpi.com/2076-3425/3/2/460/pdf-vor |
