| article html file updated | 8 February 2020 15:36 CET | Update | https://www.mdpi.com/1422-0067/18/9/1921 |
| article html file updated | 27 September 2019 00:23 CEST | Update | N/A |
| article html file updated | 3 May 2019 03:02 CEST | Update | N/A |
| article html file updated | 30 September 2017 12:16 CEST | Update | N/A |
| article html file updated | 7 September 2017 14:13 CEST | Original file | N/A |
| article xml uploaded. | 7 September 2017 14:12 CEST | Original file | https://www.mdpi.com/1422-0067/18/9/1921/xml |
| article pdf uploaded. | 7 September 2017 14:12 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/9/1921/pdf |
