| article html file updated | 7 February 2020 09:51 CET | Update | https://www.mdpi.com/1996-1944/9/6/452 |
| article html file updated | 5 May 2019 13:32 CEST | Update | - |
| article html file updated | 27 March 2019 06:55 CET | Update | - |
| article html file updated | 28 June 2016 12:20 CEST | Update | - |
| article html file updated | 7 June 2016 13:27 CEST | Original file | - |
| article xml uploaded. | 7 June 2016 13:26 CEST | Original file | https://www.mdpi.com/1996-1944/9/6/452/xml |
| article pdf uploaded. | 7 June 2016 13:26 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/6/452/pdf |
