| article html file updated | 9 February 2020 04:26 CET | Update | https://www.mdpi.com/1999-4907/9/2/60 |
| article html file updated | 30 September 2019 05:58 CEST | Update | - |
| article html file updated | 1 May 2019 23:23 CEST | Update | - |
| article html file updated | 17 April 2019 21:59 CEST | Update | - |
| article html file updated | 28 March 2019 18:32 CET | Update | - |
| article html file updated | 14 March 2018 09:25 CET | Update | - |
| article pdf uploaded. | 31 January 2018 09:10 CET | Updated version of record | https://www.mdpi.com/1999-4907/9/2/60/pdf |
| article html file updated | 26 January 2018 09:46 CET | Original file | - |
| article xml uploaded. | 26 January 2018 09:44 CET | Update | https://www.mdpi.com/1999-4907/9/2/60/xml |
| article xml uploaded. | 26 January 2018 09:44 CET | Update | - |
| article xml uploaded. | 26 January 2018 09:44 CET | Original file | - |
| article pdf uploaded. | 26 January 2018 09:44 CET | Version of Record | https://www.mdpi.com/1999-4907/9/2/60/pdf-vor |
