| article html file updated | 8 February 2020 08:28 CET | Update | https://www.mdpi.com/2073-8994/9/6/91 |
| article html file updated | 25 September 2019 09:25 CEST | Update | - |
| article html file updated | 3 May 2019 17:06 CEST | Update | - |
| article html file updated | 28 June 2017 14:55 CEST | Update | - |
| article html file updated | 17 June 2017 22:27 CEST | Original file | - |
| article xml uploaded. | 17 June 2017 05:02 CEST | Original file | https://www.mdpi.com/2073-8994/9/6/91/xml |
| article pdf uploaded. | 17 June 2017 05:02 CEST | Updated version of record | https://www.mdpi.com/2073-8994/9/6/91/pdf |
| article pdf uploaded. | 16 June 2017 12:12 CEST | Version of Record | https://www.mdpi.com/2073-8994/9/6/91/pdf-vor |
