| article html file updated | 8 February 2020 07:39 CET | Update | https://www.mdpi.com/1422-0067/18/6/1220 |
| article html file updated | 25 September 2019 05:09 CEST | Update | - |
| article html file updated | 3 May 2019 18:40 CEST | Update | - |
| article html file updated | 28 June 2017 13:32 CEST | Update | - |
| article html file updated | 8 June 2017 08:17 CEST | Original file | - |
| article xml uploaded. | 8 June 2017 08:15 CEST | Original file | https://www.mdpi.com/1422-0067/18/6/1220/xml |
| article pdf uploaded. | 8 June 2017 08:15 CEST | Updated version of record | https://www.mdpi.com/1422-0067/18/6/1220/pdf |
| article pdf uploaded. | 7 June 2017 10:31 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/6/1220/pdf-vor |
