| article html file updated | 7 February 2020 13:26 CET | Update | https://www.mdpi.com/2073-4336/7/3/21 |
| article html file updated | 5 May 2019 06:55 CEST | Update | - |
| article html file updated | 27 March 2019 13:51 CET | Update | - |
| article html file updated | 17 August 2016 09:59 CEST | Original file | - |
| article xml uploaded. | 17 August 2016 09:58 CEST | Update | https://www.mdpi.com/2073-4336/7/3/21/xml |
| article xml uploaded. | 17 August 2016 09:58 CEST | Original file | - |
| article pdf uploaded. | 17 August 2016 09:58 CEST | Version of Record | https://www.mdpi.com/2073-4336/7/3/21/pdf |
