| article html file updated | 5 February 2020 12:40 CET | Update | https://www.mdpi.com/1999-4893/2/3/1221 |
| article html file updated | 9 May 2019 10:20 CEST | Update | - |
| article html file updated | 19 March 2019 19:46 CET | Update | - |
| article html file updated | 4 August 2017 04:25 CEST | Original file | - |
| article xml uploaded. | 4 August 2017 04:24 CEST | Original file | https://www.mdpi.com/1999-4893/2/3/1221/xml |
