| article html file updated | 7 February 2020 04:41 CET | Update | https://www.mdpi.com/1996-1073/9/2/113 |
| article html file updated | 6 May 2019 00:04 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:58 CET | Original file | N/A |
| article pdf uploaded. | 18 February 2016 08:53 CET | Version of Record | https://www.mdpi.com/1996-1073/9/2/113/pdf |
| article xml uploaded. | 18 February 2016 08:53 CET | Original file | https://www.mdpi.com/1996-1073/9/2/113/xml |
