| article html file updated | 6 February 2020 05:22 CET | Update | https://www.mdpi.com/1422-0067/14/11/21997 |
| article html file updated | 7 May 2019 22:27 CEST | Update | N/A |
| article html file updated | 21 March 2019 07:12 CET | Update | N/A |
| article html file updated | 19 August 2015 08:59 CEST | Update | N/A |
| article html file updated | 9 December 2013 08:47 CET | Original file | N/A |
| article xml file uploaded | 9 December 2013 08:47 CET | Original file | https://www.mdpi.com/1422-0067/14/11/21997/xml |
| article pdf uploaded. | 6 November 2013 10:58 CET | Version of Record | https://www.mdpi.com/1422-0067/14/11/21997/pdf |
