| article html file updated | 9 February 2020 02:32 CET | Update | https://www.mdpi.com/2312-7481/4/1/9 |
| article html file updated | 2 May 2019 03:20 CEST | Update | - |
| article html file updated | 18 April 2019 01:29 CEST | Update | - |
| article html file updated | 28 March 2019 14:20 CET | Update | - |
| article html file updated | 27 March 2018 15:01 CEST | Update | - |
| article html file updated | 10 January 2018 08:06 CET | Original file | - |
| article xml uploaded. | 10 January 2018 08:05 CET | Original file | https://www.mdpi.com/2312-7481/4/1/9/xml |
| article pdf uploaded. | 10 January 2018 08:05 CET | Version of Record | https://www.mdpi.com/2312-7481/4/1/9/pdf |
