| article html file updated | 6 February 2020 19:30 CET | Update | https://www.mdpi.com/2226-4787/3/2/13 |
| article html file updated | 20 September 2019 22:34 CEST | Update | - |
| article html file updated | 6 May 2019 18:09 CEST | Update | - |
| article html file updated | 26 March 2019 04:25 CET | Update | - |
| article html file updated | 21 August 2015 13:21 CEST | Update | - |
| article html file updated | 30 June 2015 08:04 CEST | Original file | - |
| article xml file uploaded | 30 June 2015 08:04 CEST | Original file | https://www.mdpi.com/2226-4787/3/2/13/xml |
| article pdf uploaded. | 11 June 2015 10:53 CEST | Updated version of record | https://www.mdpi.com/2226-4787/3/2/13/pdf |
| article pdf uploaded. | 9 June 2015 11:05 CEST | Version of Record | https://www.mdpi.com/2226-4787/3/2/13/pdf-vor |
