| article html file updated | 7 February 2020 09:29 CET | Update | https://www.mdpi.com/2075-4663/4/2/31 |
| article html file updated | 5 May 2019 14:16 CEST | Update | - |
| article html file updated | 27 March 2019 06:08 CET | Update | - |
| article html file updated | 4 July 2016 10:39 CEST | Update | - |
| article html file updated | 30 May 2016 11:27 CEST | Original file | - |
| article xml uploaded. | 30 May 2016 11:26 CEST | Original file | https://www.mdpi.com/2075-4663/4/2/31/xml |
| article pdf uploaded. | 30 May 2016 11:26 CEST | Version of Record | https://www.mdpi.com/2075-4663/4/2/31/pdf |
