| article html file updated | 6 February 2020 11:57 CET | Update | https://www.mdpi.com/1422-0067/15/9/15552 |
| article html file updated | 7 May 2019 08:50 CEST | Update | - |
| article html file updated | 22 March 2019 00:11 CET | Update | - |
| article html file updated | 20 August 2015 17:12 CEST | Update | - |
| article html file updated | 19 October 2014 15:59 CEST | Original file | - |
| article xml file uploaded | 19 October 2014 15:59 CEST | Original file | https://www.mdpi.com/1422-0067/15/9/15552/xml |
| article pdf uploaded. | 2 September 2014 12:00 CEST | Version of Record | https://www.mdpi.com/1422-0067/15/9/15552/pdf |
