| article html file updated | 7 February 2020 10:19 CET | Update | https://www.mdpi.com/2076-3425/6/2/19 |
| article html file updated | 5 May 2019 12:39 CEST | Update | - |
| article html file updated | 27 March 2019 07:46 CET | Update | - |
| article html file updated | 4 July 2016 06:21 CEST | Update | - |
| article html file updated | 17 June 2016 08:35 CEST | Original file | - |
| article xml uploaded. | 17 June 2016 08:34 CEST | Original file | https://www.mdpi.com/2076-3425/6/2/19/xml |
| article pdf uploaded. | 17 June 2016 08:34 CEST | Version of Record | https://www.mdpi.com/2076-3425/6/2/19/pdf |
