| article html file updated | 7 February 2020 09:56 CET | Update | https://www.mdpi.com/2075-4663/4/2/34 |
| article html file updated | 5 May 2019 13:23 CEST | Update | - |
| article html file updated | 27 March 2019 07:04 CET | Update | - |
| article html file updated | 4 July 2016 10:39 CEST | Update | - |
| article html file updated | 8 June 2016 12:07 CEST | Original file | - |
| article xml uploaded. | 8 June 2016 12:05 CEST | Original file | https://www.mdpi.com/2075-4663/4/2/34/xml |
| article pdf uploaded. | 8 June 2016 12:05 CEST | Version of Record | https://www.mdpi.com/2075-4663/4/2/34/pdf |
