| article html file updated | 8 February 2020 02:15 CET | Update | https://www.mdpi.com/2073-4360/9/4/121 |
| article html file updated | 24 September 2019 00:15 CEST | Update | - |
| article html file updated | 4 May 2019 05:02 CEST | Update | - |
| article html file updated | 18 March 2019 05:31 CET | Update | - |
| article html file updated | 28 April 2017 10:35 CEST | Update | - |
| article html file updated | 27 March 2017 14:42 CEST | Original file | - |
| article xml uploaded. | 27 March 2017 14:41 CEST | Original file | https://www.mdpi.com/2073-4360/9/4/121/xml |
| article pdf uploaded. | 27 March 2017 14:41 CEST | Updated version of record | https://www.mdpi.com/2073-4360/9/4/121/pdf |
| article pdf uploaded. | 25 March 2017 10:45 CET | Version of Record | https://www.mdpi.com/2073-4360/9/4/121/pdf-vor |
