| article html file updated | 8 February 2020 23:58 CET | Update | https://www.mdpi.com/1999-4907/8/12/502 |
| article html file updated | 29 September 2019 04:32 CEST | Update | - |
| article html file updated | 2 May 2019 08:49 CEST | Update | - |
| article html file updated | 18 April 2019 06:34 CEST | Update | - |
| article html file updated | 2 January 2018 17:04 CET | Update | - |
| article html file updated | 13 December 2017 16:02 CET | Original file | - |
| article xml uploaded. | 13 December 2017 16:00 CET | Original file | https://www.mdpi.com/1999-4907/8/12/502/xml |
| article pdf uploaded. | 13 December 2017 16:00 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/12/502/pdf |
| article pdf uploaded. | 13 December 2017 12:31 CET | Version of Record | - |
