| article html file updated | 6 February 2020 14:06 CET | Update | https://www.mdpi.com/2076-328X/4/4/487 |
| article html file updated | 7 May 2019 04:39 CEST | Update | N/A |
| article html file updated | 25 March 2019 18:39 CET | Update | N/A |
| article html file updated | 21 August 2015 03:08 CEST | Update | N/A |
| article html file updated | 30 December 2014 09:31 CET | Original file | N/A |
| article xml file uploaded | 30 December 2014 09:31 CET | Original file | https://www.mdpi.com/2076-328X/4/4/487/xml |
| article pdf uploaded. | 1 December 2014 15:23 CET | Version of Record | https://www.mdpi.com/2076-328X/4/4/487/pdf |
