| article html file updated | 7 February 2020 09:21 CET | Update | https://www.mdpi.com/1422-0067/17/6/821 |
| article html file updated | 5 May 2019 14:34 CEST | Update | - |
| article html file updated | 27 March 2019 05:52 CET | Update | - |
| article html file updated | 29 June 2016 03:22 CEST | Update | - |
| article html file updated | 26 May 2016 13:27 CEST | Original file | - |
| article xml uploaded. | 26 May 2016 12:12 CEST | Original file | https://www.mdpi.com/1422-0067/17/6/821/xml |
| article pdf uploaded. | 26 May 2016 12:12 CEST | Version of Record | https://www.mdpi.com/1422-0067/17/6/821/pdf |
