| article html file updated | 7 February 2020 04:10 CET | Update | https://www.mdpi.com/2073-4352/6/2/18 |
| article html file updated | 6 May 2019 01:10 CEST | Update | - |
| article html file updated | 26 March 2019 19:54 CET | Original file | - |
| article pdf uploaded. | 4 February 2016 16:09 CET | Updated version of record | https://www.mdpi.com/2073-4352/6/2/18/pdf |
| article pdf uploaded. | 2 February 2016 09:01 CET | Version of Record | https://www.mdpi.com/2073-4352/6/2/18/pdf-vor |
| article xml uploaded. | 2 February 2016 09:01 CET | Original file | https://www.mdpi.com/2073-4352/6/2/18/xml |
