| article html file updated | 7 February 2020 09:11 CET | Update | https://www.mdpi.com/1996-1073/9/6/395 |
| article html file updated | 5 May 2019 14:51 CEST | Update | - |
| article html file updated | 27 March 2019 05:36 CET | Update | - |
| article html file updated | 28 June 2016 09:20 CEST | Update | - |
| article html file updated | 24 May 2016 11:15 CEST | Original file | - |
| article xml uploaded. | 24 May 2016 11:13 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/395/xml |
| article pdf uploaded. | 24 May 2016 11:13 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/395/pdf |
