| article html file updated | 6 February 2020 21:33 CET | Update | https://www.mdpi.com/2305-6304/3/3/322 |
| article html file updated | 21 September 2019 01:32 CEST | Update | - |
| article html file updated | 6 May 2019 13:58 CEST | Update | - |
| article html file updated | 26 March 2019 08:19 CET | Update | - |
| article html file updated | 21 August 2015 15:29 CEST | Original file | - |
| article pdf uploaded. | 7 August 2015 13:59 CEST | Version of Record | https://www.mdpi.com/2305-6304/3/3/322/pdf |
