| article html file updated | 7 February 2020 14:05 CET | Update | https://www.mdpi.com/1422-0067/17/9/1421 |
| article html file updated | 5 May 2019 05:45 CEST | Update | N/A |
| article html file updated | 27 March 2019 15:13 CET | Update | N/A |
| article html file updated | 27 September 2016 06:03 CEST | Update | N/A |
| article html file updated | 29 August 2016 14:56 CEST | Original file | N/A |
| article xml uploaded. | 29 August 2016 14:55 CEST | Original file | https://www.mdpi.com/1422-0067/17/9/1421/xml |
| article pdf uploaded. | 29 August 2016 14:55 CEST | Version of Record | https://www.mdpi.com/1422-0067/17/9/1421/pdf |
