| article html file updated | 8 February 2020 00:31 CET | Update | https://www.mdpi.com/2227-7102/7/1/34 |
| article html file updated | 23 September 2019 14:17 CEST | Update | - |
| article html file updated | 4 May 2019 08:52 CEST | Update | - |
| article html file updated | 27 October 2017 09:56 CEST | Update | - |
| article html file updated | 1 March 2017 08:06 CET | Original file | - |
| article xml uploaded. | 1 March 2017 07:45 CET | Original file | https://www.mdpi.com/2227-7102/7/1/34/xml |
| article pdf uploaded. | 1 March 2017 07:45 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/34/pdf |
