| article html file updated | 7 February 2020 03:57 CET | Update | https://www.mdpi.com/1996-1073/9/2/83 |
| article html file updated | 6 May 2019 01:36 CEST | Update | - |
| article html file updated | 26 March 2019 19:29 CET | Original file | - |
| article pdf uploaded. | 27 January 2016 10:46 CET | Version of Record | https://www.mdpi.com/1996-1073/9/2/83/pdf |
| article xml uploaded. | 27 January 2016 10:46 CET | Original file | https://www.mdpi.com/1996-1073/9/2/83/xml |
