| article html file updated | 7 February 2020 04:45 CET | Update | https://www.mdpi.com/1424-8220/16/2/252 |
| article html file updated | 5 May 2019 23:54 CEST | Update | N/A |
| article html file updated | 26 March 2019 21:07 CET | Original file | N/A |
| article pdf uploaded. | 19 February 2016 09:39 CET | Version of Record | https://www.mdpi.com/1424-8220/16/2/252/pdf |
| article xml uploaded. | 19 February 2016 09:39 CET | Original file | https://www.mdpi.com/1424-8220/16/2/252/xml |
