| article html file updated | 9 February 2020 07:10 CET | Update | https://www.mdpi.com/2220-9964/7/2/67 |
| article html file updated | 30 September 2019 22:26 CEST | Update | - |
| article html file updated | 1 May 2019 17:17 CEST | Update | - |
| article html file updated | 17 April 2019 16:40 CEST | Update | - |
| article html file updated | 29 March 2019 00:28 CET | Update | - |
| article html file updated | 14 March 2018 14:56 CET | Update | - |
| article html file updated | 24 February 2018 09:30 CET | Original file | - |
| article xml uploaded. | 24 February 2018 09:29 CET | Original file | https://www.mdpi.com/2220-9964/7/2/67/xml |
| article pdf uploaded. | 24 February 2018 09:29 CET | Updated version of record | https://www.mdpi.com/2220-9964/7/2/67/pdf |
| article pdf uploaded. | 21 February 2018 13:40 CET | Version of Record | https://www.mdpi.com/2220-9964/7/2/67/pdf-vor |
