| article html file updated | 7 February 2020 18:45 CET | Update | https://www.mdpi.com/1422-0067/17/12/1998 |
| article html file updated | 4 May 2019 21:03 CEST | Update | - |
| article html file updated | 27 December 2016 10:57 CET | Update | - |
| article html file updated | 29 November 2016 09:59 CET | Original file | - |
| article xml uploaded. | 29 November 2016 09:58 CET | Update | https://www.mdpi.com/1422-0067/17/12/1998/xml |
| article xml uploaded. | 29 November 2016 09:58 CET | Original file | - |
| article pdf uploaded. | 29 November 2016 09:58 CET | Version of Record | https://www.mdpi.com/1422-0067/17/12/1998/pdf |
