| article html file updated | 9 February 2020 06:56 CET | Update | https://www.mdpi.com/1996-1073/11/2/444 |
| article html file updated | 30 September 2019 21:05 CEST | Update | - |
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| article html file updated | 23 February 2018 07:39 CET | Original file | - |
| article xml uploaded. | 23 February 2018 07:37 CET | Update | https://www.mdpi.com/1996-1073/11/2/444/xml |
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| article xml uploaded. | 17 February 2018 06:19 CET | Update | - |
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| article pdf uploaded. | 17 February 2018 06:19 CET | Version of Record | https://www.mdpi.com/1996-1073/11/2/444/pdf |