| article html file updated | 6 February 2020 18:33 CET | Update | https://www.mdpi.com/2221-3759/3/2/71 |
| article html file updated | 6 May 2019 20:14 CEST | Update | - |
| article html file updated | 26 March 2019 02:25 CET | Update | - |
| article html file updated | 10 October 2015 06:29 CEST | Update | - |
| article xml file uploaded | 10 October 2015 06:29 CEST | Original file | https://www.mdpi.com/2221-3759/3/2/71/xml |
| article html file updated | 21 August 2015 12:00 CEST | Original file | - |
| article pdf uploaded. | 12 May 2015 15:01 CEST | Version of Record | https://www.mdpi.com/2221-3759/3/2/71/pdf |
