| article html file updated | 8 February 2020 16:34 CET | Update | https://www.mdpi.com/1422-0067/18/9/2009 |
| article html file updated | 27 September 2019 05:39 CEST | Update | N/A |
| article html file updated | 3 May 2019 01:15 CEST | Update | N/A |
| article html file updated | 30 September 2017 12:02 CEST | Update | N/A |
| article html file updated | 19 September 2017 13:25 CEST | Original file | N/A |
| article xml uploaded. | 19 September 2017 13:24 CEST | Original file | https://www.mdpi.com/1422-0067/18/9/2009/xml |
| article pdf uploaded. | 19 September 2017 13:24 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/9/2009/pdf |
