| article html file updated | 9 February 2020 07:16 CET | Update | https://www.mdpi.com/1422-0067/19/2/621 |
| article html file updated | 30 September 2019 22:58 CEST | Update | - |
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| article html file updated | 14 March 2018 19:41 CET | Update | - |
| article html file updated | 22 February 2018 16:31 CET | Original file | - |
| article xml uploaded. | 22 February 2018 16:29 CET | Original file | https://www.mdpi.com/1422-0067/19/2/621/xml |
| article pdf uploaded. | 22 February 2018 16:29 CET | Version of Record | https://www.mdpi.com/1422-0067/19/2/621/pdf |
