| article html file updated | 7 February 2020 20:42 CET | Update | https://www.mdpi.com/1422-0067/18/1/60 |
| article html file updated | 22 September 2019 17:24 CEST | Update | - |
| article html file updated | 4 May 2019 16:59 CEST | Update | - |
| article html file updated | 8 February 2017 10:49 CET | Update | - |
| article html file updated | 3 January 2017 08:59 CET | Original file | - |
| article xml uploaded. | 3 January 2017 08:57 CET | Update | https://www.mdpi.com/1422-0067/18/1/60/xml |
| article pdf uploaded. | 3 January 2017 08:57 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/60/pdf |
