| article html file updated | 8 February 2020 02:31 CET | Update | https://www.mdpi.com/1422-0067/18/4/731 |
| article html file updated | 24 September 2019 01:44 CEST | Update | - |
| article html file updated | 4 May 2019 04:27 CEST | Update | - |
| article html file updated | 2 May 2017 05:52 CEST | Update | - |
| article html file updated | 30 March 2017 08:14 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 08:12 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/731/xml |
| article pdf uploaded. | 30 March 2017 08:12 CEST | Updated version of record | https://www.mdpi.com/1422-0067/18/4/731/pdf |
| article pdf uploaded. | 29 March 2017 14:23 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/731/pdf-vor |
