| article html file updated | 9 February 2020 03:25 CET | Update | https://www.mdpi.com/2079-3197/6/1/4 |
| article html file updated | 2 May 2019 01:32 CEST | Update | - |
| article html file updated | 17 April 2019 23:51 CEST | Update | - |
| article html file updated | 28 March 2019 16:22 CET | Update | - |
| article html file updated | 26 March 2018 15:55 CEST | Update | - |
| article html file updated | 17 January 2018 14:59 CET | Original file | - |
| article xml uploaded. | 17 January 2018 14:58 CET | Original file | https://www.mdpi.com/2079-3197/6/1/4/xml |
| article pdf uploaded. | 17 January 2018 14:58 CET | Version of Record | https://www.mdpi.com/2079-3197/6/1/4/pdf |
