| article html file updated | 8 February 2020 08:04 CET | Update | https://www.mdpi.com/2072-6694/9/6/67 |
| article html file updated | 25 September 2019 07:17 CEST | Update | N/A |
| article html file updated | 3 May 2019 17:51 CEST | Update | N/A |
| article html file updated | 27 June 2017 09:56 CEST | Update | N/A |
| article html file updated | 12 June 2017 11:48 CEST | Original file | N/A |
| article xml uploaded. | 12 June 2017 11:47 CEST | Original file | https://www.mdpi.com/2072-6694/9/6/67/xml |
| article pdf uploaded. | 12 June 2017 11:47 CEST | Version of Record | https://www.mdpi.com/2072-6694/9/6/67/pdf |
