| article html file updated | 7 February 2020 02:23 CET | Update | https://www.mdpi.com/2077-1444/6/4/1411 |
| article html file updated | 21 September 2019 08:08 CEST | Update | - |
| article html file updated | 6 May 2019 04:40 CEST | Update | - |
| article html file updated | 26 March 2019 16:44 CET | Original file | - |
| article pdf uploaded. | 18 December 2015 09:04 CET | Version of Record | https://www.mdpi.com/2077-1444/6/4/1411/pdf |
| article xml uploaded. | 18 December 2015 09:04 CET | Original file | https://www.mdpi.com/2077-1444/6/4/1411/xml |
