| article html file updated | 7 February 2020 05:06 CET | Update | https://www.mdpi.com/2305-6320/3/1/7 |
| article html file updated | 5 May 2019 23:07 CEST | Update | - |
| article html file updated | 26 March 2019 21:52 CET | Original file | - |
| article pdf uploaded. | 26 February 2016 14:21 CET | Version of Record | https://www.mdpi.com/2305-6320/3/1/7/pdf |
| article xml uploaded. | 26 February 2016 14:21 CET | Original file | https://www.mdpi.com/2305-6320/3/1/7/xml |
