| article html file updated | 7 February 2020 01:53 CET | Update | https://www.mdpi.com/2310-2861/1/2/235 |
| article html file updated | 6 May 2019 05:42 CEST | Update | - |
| article html file updated | 26 March 2019 15:55 CET | Original file | - |
| article pdf uploaded. | 7 December 2015 15:33 CET | Version of Record | https://www.mdpi.com/2310-2861/1/2/235/pdf |
| article xml uploaded. | 7 December 2015 15:33 CET | Original file | https://www.mdpi.com/2310-2861/1/2/235/xml |
