| article html file updated | 7 February 2020 20:26 CET | Update | https://www.mdpi.com/1999-4907/8/1/15 |
| article html file updated | 22 September 2019 15:56 CEST | Update | - |
| article html file updated | 4 May 2019 17:33 CEST | Update | - |
| article html file updated | 8 February 2017 10:16 CET | Update | - |
| article html file updated | 28 December 2016 10:45 CET | Original file | - |
| article xml uploaded. | 28 December 2016 10:32 CET | Update | https://www.mdpi.com/1999-4907/8/1/15/xml |
| article xml uploaded. | 28 December 2016 10:32 CET | Original file | - |
| article pdf uploaded. | 28 December 2016 10:32 CET | Version of Record | https://www.mdpi.com/1999-4907/8/1/15/pdf |
