| article html file updated | 7 February 2020 04:33 CET | Update | https://www.mdpi.com/1996-1073/9/2/106 |
| article html file updated | 6 May 2019 00:23 CEST | Update | - |
| article html file updated | 26 March 2019 20:41 CET | Original file | - |
| article pdf uploaded. | 17 February 2016 02:48 CET | Updated version of record | https://www.mdpi.com/1996-1073/9/2/106/pdf |
| article xml uploaded. | 17 February 2016 02:48 CET | Update | https://www.mdpi.com/1996-1073/9/2/106/xml |
| article pdf uploaded. | 16 February 2016 11:58 CET | Version of Record | - |
| article xml uploaded. | 16 February 2016 11:58 CET | Original file | - |
