| article html file updated | 8 February 2020 13:38 CET | Update | https://www.mdpi.com/2076-0787/6/3/61 |
| article html file updated | 10 January 2020 00:20 CET | Update | - |
| article html file updated | 3 May 2019 06:45 CEST | Update | - |
| article html file updated | 27 March 2019 21:02 CET | Update | - |
| article html file updated | 16 August 2017 07:46 CEST | Original file | - |
| article xml uploaded. | 16 August 2017 07:45 CEST | Update | https://www.mdpi.com/2076-0787/6/3/61/xml |
| article xml uploaded. | 16 August 2017 07:45 CEST | Original file | - |
| article pdf uploaded. | 16 August 2017 07:45 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/3/61/pdf |
