| article html file updated | 7 February 2020 20:42 CET | Update | https://www.mdpi.com/1422-0067/18/1/81 |
| article html file updated | 22 September 2019 17:25 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:58 CEST | Update | N/A |
| article html file updated | 8 February 2017 10:53 CET | Update | N/A |
| article html file updated | 3 January 2017 10:11 CET | Original file | N/A |
| article xml uploaded. | 3 January 2017 10:10 CET | Original file | https://www.mdpi.com/1422-0067/18/1/81/xml |
| article pdf uploaded. | 3 January 2017 10:10 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/81/pdf |
