| article html file updated | 7 February 2020 20:32 CET | Update | https://www.mdpi.com/2306-5710/3/1/2 |
| article html file updated | 4 May 2019 17:19 CEST | Update | - |
| article html file updated | 1 January 2017 02:58 CET | Original file | - |
| article xml uploaded. | 1 January 2017 02:57 CET | Original file | https://www.mdpi.com/2306-5710/3/1/2/xml |
| article pdf uploaded. | 1 January 2017 02:57 CET | Version of Record | https://www.mdpi.com/2306-5710/3/1/2/pdf |
