| article html file updated | 8 February 2020 03:59 CET | Update | https://www.mdpi.com/1999-4907/8/4/128 |
| article html file updated | 24 September 2019 10:09 CEST | Update | - |
| article html file updated | 4 May 2019 01:27 CEST | Update | - |
| article html file updated | 28 April 2017 06:44 CEST | Update | - |
| article html file updated | 22 April 2017 03:19 CEST | Original file | - |
| article xml uploaded. | 22 April 2017 03:18 CEST | Original file | https://www.mdpi.com/1999-4907/8/4/128/xml |
| article pdf uploaded. | 22 April 2017 03:18 CEST | Updated version of record | https://www.mdpi.com/1999-4907/8/4/128/pdf |
