| article html file updated | 7 February 2020 06:20 CET | Update | https://www.mdpi.com/1422-0067/17/4/434 |
| article html file updated | 21 September 2019 13:50 CEST | Update | - |
| article html file updated | 5 May 2019 20:34 CEST | Update | - |
| article html file updated | 27 March 2019 00:13 CET | Update | - |
| article html file updated | 28 April 2016 04:38 CEST | Original file | - |
| article pdf uploaded. | 24 March 2016 11:08 CET | Version of Record | https://www.mdpi.com/1422-0067/17/4/434/pdf |
