| article html file updated | 8 February 2020 15:30 CET | Update | https://www.mdpi.com/1999-5903/9/3/50 |
| article html file updated | 26 September 2019 23:47 CEST | Update | - |
| article html file updated | 3 May 2019 03:14 CEST | Update | - |
| article html file updated | 30 September 2017 14:02 CEST | Update | - |
| article html file updated | 6 September 2017 15:34 CEST | Original file | - |
| article xml uploaded. | 6 September 2017 15:33 CEST | Original file | https://www.mdpi.com/1999-5903/9/3/50/xml |
| article pdf uploaded. | 6 September 2017 15:33 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/3/50/pdf |
