| article html file updated | 8 February 2020 07:48 CET | Update | https://www.mdpi.com/2073-4360/9/6/211 |
| article html file updated | 25 September 2019 06:00 CEST | Update | - |
| article html file updated | 3 May 2019 18:21 CEST | Update | - |
| article html file updated | 18 March 2019 05:55 CET | Update | - |
| article html file updated | 28 June 2017 14:20 CEST | Update | - |
| article html file updated | 8 June 2017 12:57 CEST | Original file | - |
| article xml uploaded. | 8 June 2017 12:56 CEST | Original file | https://www.mdpi.com/2073-4360/9/6/211/xml |
| article pdf uploaded. | 8 June 2017 12:56 CEST | Version of Record | https://www.mdpi.com/2073-4360/9/6/211/pdf |
