| article html file updated | 6 February 2020 16:54 CET | Update | https://www.mdpi.com/2075-4698/5/1/220 |
| article html file updated | 20 September 2019 19:11 CEST | Update | - |
| article html file updated | 6 May 2019 23:14 CEST | Update | - |
| article html file updated | 25 March 2019 23:26 CET | Update | - |
| article html file updated | 21 August 2015 09:13 CEST | Original file | - |
| article pdf uploaded. | 23 March 2015 15:51 CET | Version of Record | https://www.mdpi.com/2075-4698/5/1/220/pdf |
