| article html file updated | 9 February 2020 00:10 CET | Update | https://www.mdpi.com/1999-4907/8/12/504 |
| article html file updated | 29 September 2019 05:46 CEST | Update | - |
| article html file updated | 2 May 2019 08:22 CEST | Update | - |
| article html file updated | 18 April 2019 06:09 CEST | Update | - |
| article html file updated | 2 January 2018 17:04 CET | Update | - |
| article html file updated | 15 December 2017 08:31 CET | Original file | - |
| article xml uploaded. | 15 December 2017 08:29 CET | Original file | https://www.mdpi.com/1999-4907/8/12/504/xml |
| article pdf uploaded. | 15 December 2017 08:29 CET | Version of Record | https://www.mdpi.com/1999-4907/8/12/504/pdf |
