| article html file updated | 9 February 2020 10:44 CET | Update | https://www.mdpi.com/1422-0067/19/4/939 |
| article html file updated | 1 October 2019 20:31 CEST | Update | - |
| article html file updated | 1 May 2019 09:50 CEST | Update | - |
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| article html file updated | 22 March 2018 03:10 CET | Original file | - |
| article xml uploaded. | 22 March 2018 03:09 CET | Update | https://www.mdpi.com/1422-0067/19/4/939/xml |
| article pdf uploaded. | 22 March 2018 03:09 CET | Version of Record | https://www.mdpi.com/1422-0067/19/4/939/pdf |
