| article html file updated | 7 February 2020 22:50 CET | Update | https://www.mdpi.com/1999-4907/8/2/39 |
| article html file updated | 23 September 2019 04:53 CEST | Update | - |
| article html file updated | 4 May 2019 12:21 CEST | Update | - |
| article html file updated | 28 February 2017 10:53 CET | Update | - |
| article html file updated | 8 February 2017 15:43 CET | Original file | - |
| article xml uploaded. | 8 February 2017 15:41 CET | Original file | https://www.mdpi.com/1999-4907/8/2/39/xml |
| article pdf uploaded. | 8 February 2017 15:41 CET | Version of Record | https://www.mdpi.com/1999-4907/8/2/39/pdf |
