| article html file updated | 6 February 2020 18:01 CET | Update | https://www.mdpi.com/2220-9964/4/2/697 |
| article html file updated | 6 May 2019 21:14 CEST | Update | N/A |
| article html file updated | 26 March 2019 01:22 CET | Update | N/A |
| article html file updated | 21 August 2015 11:09 CEST | Update | N/A |
| article html file updated | 8 July 2015 11:37 CEST | Original file | N/A |
| article xml file uploaded | 8 July 2015 11:37 CEST | Original file | https://www.mdpi.com/2220-9964/4/2/697/xml |
| article pdf uploaded. | 24 April 2015 11:52 CEST | Version of Record | https://www.mdpi.com/2220-9964/4/2/697/pdf |
