| article html file updated | 8 February 2020 07:17 CET | Update | https://www.mdpi.com/2076-3425/7/6/60 |
| article html file updated | 25 September 2019 03:14 CEST | Update | - |
| article html file updated | 3 May 2019 19:20 CEST | Update | - |
| article html file updated | 27 June 2017 09:55 CEST | Original file | - |
| article xml uploaded. | 2 June 2017 11:57 CEST | Original file | https://www.mdpi.com/2076-3425/7/6/60/xml |
| article pdf uploaded. | 2 June 2017 11:57 CEST | Version of Record | https://www.mdpi.com/2076-3425/7/6/60/pdf |
