| article html file updated | 7 February 2020 20:09 CET | Update | https://www.mdpi.com/1422-0067/18/1/18 |
| article html file updated | 22 September 2019 14:22 CEST | Update | N/A |
| article html file updated | 4 May 2019 18:07 CEST | Update | N/A |
| article html file updated | 8 February 2017 10:43 CET | Update | N/A |
| article html file updated | 22 December 2016 12:10 CET | Original file | N/A |
| article xml uploaded. | 22 December 2016 12:09 CET | Update | https://www.mdpi.com/1422-0067/18/1/18/xml |
| article xml uploaded. | 22 December 2016 12:09 CET | Original file | N/A |
| article pdf uploaded. | 22 December 2016 12:09 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/18/pdf |
