| article html file updated | 8 February 2020 20:41 CET | Update | https://www.mdpi.com/2227-9717/5/4/69 |
| article html file updated | 28 September 2019 08:09 CEST | Update | - |
| article html file updated | 2 May 2019 16:08 CEST | Update | - |
| article html file updated | 2 January 2018 11:53 CET | Update | - |
| article html file updated | 9 November 2017 10:16 CET | Original file | - |
| article xml uploaded. | 9 November 2017 10:14 CET | Update | https://www.mdpi.com/2227-9717/5/4/69/xml |
| article xml uploaded. | 9 November 2017 10:14 CET | Original file | - |
| article pdf uploaded. | 9 November 2017 10:14 CET | Updated version of record | https://www.mdpi.com/2227-9717/5/4/69/pdf |
| article pdf uploaded. | 8 November 2017 15:43 CET | Version of Record | https://www.mdpi.com/2227-9717/5/4/69/pdf-vor |
