| article html file updated | 7 February 2020 22:17 CET | Update | https://www.mdpi.com/1422-0067/18/2/256 |
| article html file updated | 23 September 2019 01:51 CEST | Update | - |
| article html file updated | 4 May 2019 13:29 CEST | Update | - |
| article html file updated | 2 March 2017 09:46 CET | Update | - |
| article html file updated | 26 January 2017 08:25 CET | Original file | - |
| article xml uploaded. | 26 January 2017 08:24 CET | Original file | https://www.mdpi.com/1422-0067/18/2/256/xml |
| article pdf uploaded. | 26 January 2017 08:24 CET | Version of Record | https://www.mdpi.com/1422-0067/18/2/256/pdf |
