| article html file updated | 9 February 2020 00:54 CET | Update | https://www.mdpi.com/1422-0067/19/1/21 |
| article html file updated | 29 September 2019 10:01 CEST | Update | N/A |
| article html file updated | 2 May 2019 06:47 CEST | Update | N/A |
| article html file updated | 18 April 2019 04:41 CEST | Update | N/A |
| article html file updated | 28 March 2019 10:26 CET | Update | N/A |
| article html file updated | 2 February 2018 09:25 CET | Update | N/A |
| article html file updated | 22 December 2017 12:14 CET | Original file | N/A |
| article xml uploaded. | 22 December 2017 12:13 CET | Update | https://www.mdpi.com/1422-0067/19/1/21/xml |
| article xml uploaded. | 22 December 2017 12:13 CET | Original file | N/A |
| article pdf uploaded. | 22 December 2017 12:13 CET | Version of Record | https://www.mdpi.com/1422-0067/19/1/21/pdf |
