| article html file updated | 7 February 2020 18:13 CET | Update | https://www.mdpi.com/2075-4418/6/4/42 |
| article html file updated | 22 September 2019 06:01 CEST | Update | - |
| article html file updated | 4 May 2019 22:06 CEST | Update | - |
| article html file updated | 28 December 2016 11:46 CET | Update | - |
| article html file updated | 18 November 2016 13:00 CET | Original file | - |
| article xml uploaded. | 18 November 2016 12:59 CET | Update | https://www.mdpi.com/2075-4418/6/4/42/xml |
| article xml uploaded. | 18 November 2016 12:59 CET | Original file | - |
| article pdf uploaded. | 18 November 2016 12:59 CET | Version of Record | https://www.mdpi.com/2075-4418/6/4/42/pdf |
