| article html file updated | 7 February 2020 23:21 CET | Update | https://www.mdpi.com/2076-0760/6/1/15 |
| article html file updated | 4 May 2019 11:21 CEST | Update | - |
| article html file updated | 15 February 2017 02:38 CET | Original file | - |
| article xml uploaded. | 15 February 2017 02:36 CET | Update | https://www.mdpi.com/2076-0760/6/1/15/xml |
| article xml uploaded. | 15 February 2017 02:36 CET | Update | - |
| article xml uploaded. | 14 February 2017 11:00 CET | Original file | - |
| article pdf uploaded. | 14 February 2017 11:00 CET | Version of Record | https://www.mdpi.com/2076-0760/6/1/15/pdf |
