| article html file updated | 7 February 2020 02:24 CET | Update | https://www.mdpi.com/2078-2489/6/4/880 |
| article html file updated | 21 September 2019 08:09 CEST | Update | N/A |
| article html file updated | 6 May 2019 04:38 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:45 CET | Original file | N/A |
| article pdf uploaded. | 18 December 2015 09:20 CET | Version of Record | https://www.mdpi.com/2078-2489/6/4/880/pdf |
| article xml uploaded. | 18 December 2015 09:20 CET | Original file | https://www.mdpi.com/2078-2489/6/4/880/xml |
