| article html file updated | 7 February 2020 17:23 CET | Update | https://www.mdpi.com/2075-471X/5/4/40 |
| article html file updated | 4 May 2019 23:43 CEST | Update | N/A |
| article html file updated | 2 November 2016 11:28 CET | Original file | N/A |
| article xml uploaded. | 2 November 2016 11:26 CET | Original file | https://www.mdpi.com/2075-471X/5/4/40/xml |
| article pdf uploaded. | 2 November 2016 11:26 CET | Version of Record | https://www.mdpi.com/2075-471X/5/4/40/pdf |
