| article html file updated | 8 February 2020 07:08 CET | Update | https://www.mdpi.com/2073-8994/9/6/81 |
| article html file updated | 25 September 2019 02:32 CEST | Update | N/A |
| article html file updated | 3 May 2019 19:38 CEST | Update | N/A |
| article html file updated | 28 June 2017 14:54 CEST | Update | N/A |
| article html file updated | 1 June 2017 12:04 CEST | Original file | N/A |
| article xml uploaded. | 1 June 2017 12:03 CEST | Original file | https://www.mdpi.com/2073-8994/9/6/81/xml |
| article pdf uploaded. | 1 June 2017 12:03 CEST | Updated version of record | https://www.mdpi.com/2073-8994/9/6/81/pdf |
| article pdf uploaded. | 31 May 2017 13:44 CEST | Version of Record | https://www.mdpi.com/2073-8994/9/6/81/pdf-vor |
