| article html file updated | 7 February 2020 03:05 CET | Update | https://www.mdpi.com/2076-3263/6/1/3 |
| article html file updated | 6 May 2019 03:13 CEST | Update | - |
| article html file updated | 26 March 2019 17:49 CET | Original file | - |
| article pdf uploaded. | 6 January 2016 14:28 CET | Version of Record | https://www.mdpi.com/2076-3263/6/1/3/pdf |
| article xml uploaded. | 6 January 2016 14:28 CET | Original file | https://www.mdpi.com/2076-3263/6/1/3/xml |
