| article html file updated | 6 February 2020 07:20 CET | Update | https://www.mdpi.com/1422-0067/15/2/2906 |
| article html file updated | 7 May 2019 18:30 CEST | Update | N/A |
| article html file updated | 21 March 2019 12:30 CET | Update | N/A |
| article html file updated | 19 August 2015 20:50 CEST | Update | N/A |
| article html file updated | 20 March 2014 10:07 CET | Original file | N/A |
| article xml file uploaded | 20 March 2014 10:07 CET | Original file | https://www.mdpi.com/1422-0067/15/2/2906/xml |
| article pdf uploaded. | 19 February 2014 11:47 CET | Version of Record | https://www.mdpi.com/1422-0067/15/2/2906/pdf |
