| article html file updated | 7 February 2020 10:36 CET | Update | https://www.mdpi.com/1422-0067/17/6/991 |
| article html file updated | 5 May 2019 12:07 CEST | Update | - |
| article html file updated | 27 March 2019 08:15 CET | Update | - |
| article html file updated | 29 June 2016 04:06 CEST | Update | - |
| article html file updated | 22 June 2016 14:21 CEST | Original file | - |
| article xml uploaded. | 22 June 2016 14:20 CEST | Update | https://www.mdpi.com/1422-0067/17/6/991/xml |
| article pdf uploaded. | 22 June 2016 14:20 CEST | Version of Record | https://www.mdpi.com/1422-0067/17/6/991/pdf |
