| article html file updated | 7 February 2020 22:22 CET | Update | https://www.mdpi.com/2077-1444/8/2/18 |
| article html file updated | 4 May 2019 13:18 CEST | Update | - |
| article html file updated | 1 March 2017 11:07 CET | Update | - |
| article html file updated | 6 February 2017 11:36 CET | Original file | - |
| article xml uploaded. | 6 February 2017 11:34 CET | Original file | https://www.mdpi.com/2077-1444/8/2/18/xml |
| article pdf uploaded. | 6 February 2017 11:34 CET | Updated version of record | https://www.mdpi.com/2077-1444/8/2/18/pdf |
| article pdf uploaded. | 27 January 2017 16:49 CET | Version of Record | https://www.mdpi.com/2077-1444/8/2/18/pdf-vor |
