| article html file updated | 7 February 2020 19:19 CET | Update | https://www.mdpi.com/2220-9964/5/12/239 |
| article html file updated | 22 September 2019 09:50 CEST | Update | - |
| article html file updated | 4 May 2019 19:51 CEST | Update | - |
| article html file updated | 28 December 2016 10:48 CET | Update | - |
| article html file updated | 9 December 2016 08:59 CET | Original file | - |
| article xml uploaded. | 9 December 2016 08:57 CET | Original file | https://www.mdpi.com/2220-9964/5/12/239/xml |
| article pdf uploaded. | 9 December 2016 08:57 CET | Version of Record | https://www.mdpi.com/2220-9964/5/12/239/pdf |
