| article html file updated | 8 February 2020 11:28 CET | Update | https://www.mdpi.com/2220-9964/6/7/221 |
| article html file updated | 26 September 2019 01:12 CEST | Update | - |
| article html file updated | 3 May 2019 11:28 CEST | Update | - |
| article html file updated | 27 March 2019 16:40 CET | Update | - |
| article html file updated | 31 July 2017 07:32 CEST | Update | - |
| article html file updated | 19 July 2017 14:28 CEST | Update | - |
| article html file updated | 19 July 2017 14:27 CEST | Update | - |
| article html file updated | 19 July 2017 14:26 CEST | Original file | - |
| article xml uploaded. | 19 July 2017 14:25 CEST | Original file | https://www.mdpi.com/2220-9964/6/7/221/xml |
| article pdf uploaded. | 19 July 2017 14:25 CEST | Version of Record | https://www.mdpi.com/2220-9964/6/7/221/pdf |
