| article html file updated | 6 February 2020 16:12 CET | Update | https://www.mdpi.com/2227-9067/2/1/78 |
| article html file updated | 20 September 2019 18:19 CEST | Update | - |
| article html file updated | 7 May 2019 00:31 CEST | Update | - |
| article html file updated | 25 March 2019 22:13 CET | Update | - |
| article html file updated | 21 August 2015 08:03 CEST | Original file | - |
| article pdf uploaded. | 27 February 2015 15:49 CET | Version of Record | https://www.mdpi.com/2227-9067/2/1/78/pdf |
