| article html file updated | 9 February 2020 09:17 CET | Update | https://www.mdpi.com/2221-3759/6/1/7 |
| article html file updated | 1 October 2019 10:40 CEST | Update | - |
| article html file updated | 1 May 2019 12:55 CEST | Update | - |
| article html file updated | 17 April 2019 12:36 CEST | Update | - |
| article html file updated | 29 March 2019 05:21 CET | Update | - |
| article html file updated | 27 March 2018 12:42 CEST | Update | - |
| article html file updated | 9 March 2018 14:10 CET | Original file | - |
| article xml uploaded. | 9 March 2018 14:09 CET | Update | https://www.mdpi.com/2221-3759/6/1/7/xml |
| article pdf uploaded. | 9 March 2018 14:09 CET | Version of Record | https://www.mdpi.com/2221-3759/6/1/7/pdf |
