| article html file updated | 7 February 2020 09:49 CET | Update | https://www.mdpi.com/1422-0067/17/6/820 |
| article html file updated | 5 May 2019 13:36 CEST | Update | - |
| article html file updated | 27 March 2019 06:50 CET | Update | - |
| article html file updated | 29 June 2016 03:22 CEST | Update | - |
| article html file updated | 6 June 2016 15:14 CEST | Original file | - |
| article xml uploaded. | 6 June 2016 15:12 CEST | Original file | https://www.mdpi.com/1422-0067/17/6/820/xml |
| article pdf uploaded. | 6 June 2016 15:12 CEST | Version of Record | https://www.mdpi.com/1422-0067/17/6/820/pdf |
