| article html file updated | 9 February 2020 06:59 CET | Update | https://www.mdpi.com/2227-7072/6/1/22 |
| article html file updated | 1 May 2019 17:43 CEST | Update | - |
| article html file updated | 17 April 2019 17:03 CEST | Update | - |
| article html file updated | 29 March 2019 00:03 CET | Update | - |
| article html file updated | 26 March 2018 15:44 CEST | Update | - |
| article html file updated | 24 February 2018 09:10 CET | Original file | - |
| article xml uploaded. | 24 February 2018 09:09 CET | Original file | https://www.mdpi.com/2227-7072/6/1/22/xml |
| article pdf uploaded. | 24 February 2018 09:09 CET | Updated version of record | https://www.mdpi.com/2227-7072/6/1/22/pdf |
| article pdf uploaded. | 17 February 2018 10:16 CET | Version of Record | https://www.mdpi.com/2227-7072/6/1/22/pdf-vor |
