| article html file updated | 7 February 2020 10:08 CET | Update | https://www.mdpi.com/1999-4907/7/6/123 |
| article html file updated | 21 September 2019 19:00 CEST | Update | N/A |
| article html file updated | 5 May 2019 13:01 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:25 CET | Update | N/A |
| article html file updated | 29 June 2016 11:34 CEST | Update | N/A |
| article html file updated | 14 June 2016 14:21 CEST | Original file | N/A |
| article xml uploaded. | 14 June 2016 14:19 CEST | Original file | https://www.mdpi.com/1999-4907/7/6/123/xml |
| article pdf uploaded. | 14 June 2016 14:19 CEST | Version of Record | https://www.mdpi.com/1999-4907/7/6/123/pdf |
