| article html file updated | 7 February 2020 21:07 CET | Update | https://www.mdpi.com/1999-4907/8/1/22 |
| article html file updated | 22 September 2019 19:42 CEST | Update | - |
| article html file updated | 4 May 2019 16:04 CEST | Update | - |
| article html file updated | 8 February 2017 10:20 CET | Update | - |
| article html file updated | 10 January 2017 12:01 CET | Original file | - |
| article xml uploaded. | 10 January 2017 12:00 CET | Original file | https://www.mdpi.com/1999-4907/8/1/22/xml |
| article pdf uploaded. | 10 January 2017 12:00 CET | Version of Record | https://www.mdpi.com/1999-4907/8/1/22/pdf |
