| article html file updated | 7 February 2020 15:04 CET | Update | https://www.mdpi.com/1999-4907/7/9/206 |
| article html file updated | 5 May 2019 03:56 CEST | Update | - |
| article html file updated | 28 September 2016 07:23 CEST | Update | - |
| article html file updated | 16 September 2016 08:25 CEST | Original file | - |
| article xml uploaded. | 16 September 2016 08:23 CEST | Update | https://www.mdpi.com/1999-4907/7/9/206/xml |
| article xml uploaded. | 16 September 2016 08:23 CEST | Original file | - |
| article pdf uploaded. | 16 September 2016 08:23 CEST | Version of Record | https://www.mdpi.com/1999-4907/7/9/206/pdf |
