| article html file updated | 7 February 2020 04:29 CET | Update | https://www.mdpi.com/1996-1944/9/2/98 |
| article html file updated | 6 May 2019 00:32 CEST | Update | - |
| article html file updated | 26 March 2019 20:33 CET | Original file | - |
| article pdf uploaded. | 8 February 2016 11:50 CET | Version of Record | https://www.mdpi.com/1996-1944/9/2/98/pdf |
| article xml uploaded. | 8 February 2016 11:50 CET | Original file | https://www.mdpi.com/1996-1944/9/2/98/xml |
