| article html file updated | 7 February 2020 06:42 CET | Update | https://www.mdpi.com/1996-1944/9/4/261 |
| article html file updated | 5 May 2019 19:51 CEST | Update | - |
| article html file updated | 27 March 2019 00:48 CET | Update | - |
| article html file updated | 28 April 2016 10:54 CEST | Update | - |
| article html file updated | 31 March 2016 14:29 CEST | Original file | - |
| article xml uploaded. | 31 March 2016 14:28 CEST | Original file | https://www.mdpi.com/1996-1944/9/4/261/xml |
| article pdf uploaded. | 31 March 2016 14:28 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/4/261/pdf |
