| article html file updated | 6 February 2020 00:26 CET | Update | https://www.mdpi.com/2220-9964/2/1/67 |
| article html file updated | 8 May 2019 08:45 CEST | Update | N/A |
| article html file updated | 20 March 2019 18:18 CET | Update | N/A |
| article html file updated | 17 June 2015 06:16 CEST | Update | N/A |
| article html file updated | 10 November 2014 07:32 CET | Original file | N/A |
| article xml file uploaded | 10 November 2014 07:32 CET | Original file | https://www.mdpi.com/2220-9964/2/1/67/xml |
| article pdf uploaded. | 6 February 2013 09:04 CET | Version of Record | https://www.mdpi.com/2220-9964/2/1/67/pdf |
