| article html file updated | 7 February 2020 23:23 CET | Update | https://www.mdpi.com/2226-4310/4/1/8 |
| article html file updated | 23 September 2019 07:55 CEST | Update | - |
| article html file updated | 4 May 2019 11:16 CEST | Update | - |
| article html file updated | 29 March 2017 05:57 CEST | Update | - |
| article html file updated | 16 February 2017 02:45 CET | Original file | - |
| article xml uploaded. | 16 February 2017 02:43 CET | Original file | https://www.mdpi.com/2226-4310/4/1/8/xml |
| article pdf uploaded. | 14 February 2017 12:58 CET | Version of Record | https://www.mdpi.com/2226-4310/4/1/8/pdf |
