| article html file updated | 7 February 2020 17:26 CET | Update | https://www.mdpi.com/2221-3759/4/4/32 |
| article html file updated | 4 May 2019 23:38 CEST | Update | - |
| article html file updated | 28 December 2016 11:32 CET | Update | - |
| article html file updated | 3 November 2016 09:06 CET | Original file | - |
| article xml uploaded. | 3 November 2016 09:05 CET | Update | https://www.mdpi.com/2221-3759/4/4/32/xml |
| article xml uploaded. | 3 November 2016 09:05 CET | Original file | - |
| article pdf uploaded. | 3 November 2016 09:05 CET | Version of Record | https://www.mdpi.com/2221-3759/4/4/32/pdf |
