| article html file updated | 8 February 2020 16:38 CET | Update | https://www.mdpi.com/1422-0067/18/9/2006 |
| article html file updated | 27 September 2019 06:04 CEST | Update | N/A |
| article html file updated | 3 May 2019 01:08 CEST | Update | N/A |
| article html file updated | 30 September 2017 12:01 CEST | Update | N/A |
| article html file updated | 19 September 2017 21:10 CEST | Original file | N/A |
| article xml uploaded. | 19 September 2017 21:08 CEST | Update | https://www.mdpi.com/1422-0067/18/9/2006/xml |
| article xml uploaded. | 19 September 2017 21:08 CEST | Original file | N/A |
| article pdf uploaded. | 19 September 2017 21:08 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/9/2006/pdf |
