| article html file updated | 9 February 2020 05:19 CET | Update | https://www.mdpi.com/1996-1073/11/2/334 |
| article html file updated | 30 September 2019 11:27 CEST | Update | - |
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| article xml uploaded. | 2 February 2018 10:37 CET | Original file | https://www.mdpi.com/1996-1073/11/2/334/xml |
| article pdf uploaded. | 2 February 2018 10:37 CET | Version of Record | https://www.mdpi.com/1996-1073/11/2/334/pdf |
