| article html file updated | 6 February 2020 05:34 CET | Update | https://www.mdpi.com/2076-3425/3/4/1554 |
| article html file updated | 7 May 2019 22:04 CEST | Update | N/A |
| article html file updated | 21 March 2019 07:42 CET | Update | N/A |
| article html file updated | 19 August 2015 09:49 CEST | Update | N/A |
| article html file updated | 20 May 2014 10:07 CEST | Original file | N/A |
| article xml file uploaded | 20 May 2014 10:07 CEST | Original file | https://www.mdpi.com/2076-3425/3/4/1554/xml |
| article pdf uploaded. | 15 November 2013 14:07 CET | Version of Record | https://www.mdpi.com/2076-3425/3/4/1554/pdf |
