| article html file updated | 7 February 2020 17:08 CET | Update | https://new.mdpi.com/2075-4698/6/4/31 |
| article html file updated | 22 September 2019 04:11 CEST | Update | - |
| article html file updated | 5 May 2019 00:09 CEST | Update | - |
| article html file updated | 29 December 2016 06:47 CET | Update | - |
| article html file updated | 28 October 2016 10:26 CEST | Original file | - |
| article xml uploaded. | 28 October 2016 10:24 CEST | Original file | https://new.mdpi.com/2075-4698/6/4/31/xml |
| article pdf uploaded. | 28 October 2016 10:24 CEST | Version of Record | https://new.mdpi.com/2075-4698/6/4/31/pdf |
