| article html file updated | 7 February 2020 20:34 CET | Update | https://www.mdpi.com/1422-0067/18/1/69 |
| article html file updated | 22 September 2019 16:40 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:16 CEST | Update | N/A |
| article html file updated | 8 February 2017 10:51 CET | Update | N/A |
| article html file updated | 30 December 2016 11:36 CET | Original file | N/A |
| article xml uploaded. | 30 December 2016 11:35 CET | Original file | https://www.mdpi.com/1422-0067/18/1/69/xml |
| article pdf uploaded. | 30 December 2016 11:35 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/69/pdf |
