| article html file updated | 8 February 2020 02:44 CET | Update | https://www.mdpi.com/2077-0383/6/4/41 |
| article html file updated | 24 September 2019 03:02 CEST | Update | - |
| article html file updated | 4 May 2019 03:57 CEST | Update | - |
| article html file updated | 28 April 2017 06:48 CEST | Update | - |
| article html file updated | 1 April 2017 12:06 CEST | Original file | - |
| article xml uploaded. | 1 April 2017 12:05 CEST | Original file | https://www.mdpi.com/2077-0383/6/4/41/xml |
| article pdf uploaded. | 1 April 2017 12:05 CEST | Version of Record | https://www.mdpi.com/2077-0383/6/4/41/pdf |
