| article html file updated | 7 February 2020 04:23 CET | Update | https://www.mdpi.com/1424-8220/16/2/221 |
| article html file updated | 6 May 2019 00:44 CEST | Update | - |
| article html file updated | 26 March 2019 20:21 CET | Original file | - |
| article pdf uploaded. | 19 February 2016 10:21 CET | Updated version of record | https://www.mdpi.com/1424-8220/16/2/221/pdf |
| article xml uploaded. | 19 February 2016 10:21 CET | Original file | https://www.mdpi.com/1424-8220/16/2/221/xml |
| article pdf uploaded. | 6 February 2016 07:17 CET | Version of Record | https://www.mdpi.com/1424-8220/16/2/221/pdf-vor |
