| article html file updated | 8 February 2020 14:38 CET | Update | https://www.mdpi.com/2304-8158/6/9/73 |
| article html file updated | 26 September 2019 18:58 CEST | Update | - |
| article html file updated | 3 May 2019 04:51 CEST | Update | - |
| article html file updated | 30 September 2017 10:18 CEST | Update | - |
| article html file updated | 28 August 2017 08:27 CEST | Original file | - |
| article xml uploaded. | 28 August 2017 08:26 CEST | Update | https://www.mdpi.com/2304-8158/6/9/73/xml |
| article xml uploaded. | 28 August 2017 08:26 CEST | Original file | - |
| article pdf uploaded. | 28 August 2017 08:26 CEST | Version of Record | https://www.mdpi.com/2304-8158/6/9/73/pdf |
