| article html file updated | 6 February 2020 01:28 CET | Update | https://www.mdpi.com/2076-3425/3/2/504 |
| article html file updated | 8 May 2019 06:23 CEST | Update | N/A |
| article html file updated | 20 March 2019 20:52 CET | Update | N/A |
| article html file updated | 17 June 2015 08:19 CEST | Update | N/A |
| article html file updated | 20 May 2014 08:36 CEST | Original file | N/A |
| article xml file uploaded | 20 May 2014 08:36 CEST | Original file | https://www.mdpi.com/2076-3425/3/2/504/xml |
| article pdf uploaded. | 12 April 2013 16:42 CEST | Updated version of record | https://www.mdpi.com/2076-3425/3/2/504/pdf |
| article pdf uploaded. | 10 April 2013 16:19 CEST | Version of Record | https://www.mdpi.com/2076-3425/3/2/504/pdf-vor |
