| article html file updated | 7 February 2020 21:15 CET | Update | https://www.mdpi.com/2305-6320/4/1/3 |
| article html file updated | 4 May 2019 15:48 CEST | Update | - |
| article html file updated | 11 January 2017 11:14 CET | Original file | - |
| article xml uploaded. | 11 January 2017 11:13 CET | Original file | https://www.mdpi.com/2305-6320/4/1/3/xml |
| article pdf uploaded. | 11 January 2017 11:13 CET | Version of Record | https://www.mdpi.com/2305-6320/4/1/3/pdf |
