| article html file updated | 7 February 2020 03:31 CET | Update | https://www.mdpi.com/1422-0067/17/1/121 |
| article html file updated | 6 May 2019 02:25 CEST | Update | N/A |
| article html file updated | 26 March 2019 18:38 CET | Original file | N/A |
| article pdf uploaded. | 16 January 2016 14:52 CET | Version of Record | https://www.mdpi.com/1422-0067/17/1/121/pdf |
| article xml uploaded. | 16 January 2016 14:52 CET | Original file | https://www.mdpi.com/1422-0067/17/1/121/xml |
