| article html file updated | 7 February 2020 03:15 CET | Update | https://www.mdpi.com/2075-4701/6/1/22 |
| article html file updated | 6 May 2019 02:54 CEST | Update | - |
| article html file updated | 26 March 2019 18:06 CET | Original file | - |
| article pdf uploaded. | 11 January 2016 14:46 CET | Version of Record | https://www.mdpi.com/2075-4701/6/1/22/pdf |
| article xml uploaded. | 11 January 2016 14:46 CET | Original file | https://www.mdpi.com/2075-4701/6/1/22/xml |
