| article html file updated | 6 February 2020 06:39 CET | Update | https://www.mdpi.com/2226-4787/2/1/40 |
| article html file updated | 20 September 2019 05:07 CEST | Update | N/A |
| article html file updated | 7 May 2019 19:58 CEST | Update | N/A |
| article html file updated | 21 March 2019 10:48 CET | Update | N/A |
| article html file updated | 19 August 2015 16:54 CEST | Update | N/A |
| article html file updated | 13 January 2014 17:02 CET | Original file | N/A |
| article xml uploaded. | 13 January 2014 17:02 CET | Original file | https://www.mdpi.com/2226-4787/2/1/40/xml |
| article pdf uploaded. | 10 January 2014 16:05 CET | Updated version of record | https://www.mdpi.com/2226-4787/2/1/40/pdf |
| article pdf uploaded. | 9 January 2014 08:32 CET | Version of Record | https://www.mdpi.com/2226-4787/2/1/40/pdf-vor |
