| article html file updated | 6 February 2020 17:14 CET | Update | https://www.mdpi.com/2220-9964/4/2/471 |
| article html file updated | 6 May 2019 22:42 CEST | Update | N/A |
| article html file updated | 25 March 2019 23:58 CET | Update | N/A |
| article html file updated | 21 August 2015 09:49 CEST | Update | N/A |
| article html file updated | 8 July 2015 10:59 CEST | Original file | N/A |
| article xml file uploaded | 8 July 2015 10:59 CEST | Original file | https://www.mdpi.com/2220-9964/4/2/471/xml |
| article pdf uploaded. | 1 April 2015 16:45 CEST | Version of Record | https://www.mdpi.com/2220-9964/4/2/471/pdf |
