| article html file updated | 7 February 2020 07:03 CET | Update | https://www.mdpi.com/1996-1073/9/4/279 |
| article html file updated | 5 May 2019 19:05 CEST | Update | - |
| article html file updated | 27 March 2019 01:28 CET | Update | - |
| article html file updated | 28 April 2016 07:56 CEST | Update | - |
| article html file updated | 9 April 2016 08:13 CEST | Original file | - |
| article xml uploaded. | 9 April 2016 08:12 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/279/xml |
| article pdf uploaded. | 9 April 2016 08:10 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/279/pdf |
