| article html file updated | 9 February 2020 00:36 CET | Update | https://www.mdpi.com/2221-3759/5/4/18 |
| article html file updated | 29 September 2019 08:19 CEST | Update | - |
| article html file updated | 2 May 2019 07:25 CEST | Update | - |
| article html file updated | 18 April 2019 05:17 CEST | Update | - |
| article html file updated | 3 January 2018 09:07 CET | Update | - |
| article html file updated | 19 December 2017 16:41 CET | Original file | - |
| article xml uploaded. | 19 December 2017 16:39 CET | Update | https://www.mdpi.com/2221-3759/5/4/18/xml |
| article xml uploaded. | 19 December 2017 16:39 CET | Update | - |
| article xml uploaded. | 19 December 2017 16:39 CET | Update | - |
| article xml uploaded. | 19 December 2017 16:39 CET | Original file | - |
| article pdf uploaded. | 19 December 2017 16:39 CET | Version of Record | https://www.mdpi.com/2221-3759/5/4/18/pdf |
