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| article pdf uploaded. | 20 February 2020 04:54 CET | Updated version of record | https://www.mdpi.com/1422-0067/21/4/1236/pdf |
| article xml uploaded. | 20 February 2020 04:54 CET | Update | https://www.mdpi.com/1422-0067/21/4/1236/xml |
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| article html file updated | 19 February 2020 14:20 CET | Original file | - |
| article pdf uploaded. | 19 February 2020 14:19 CET | Updated version of record | https://www.mdpi.com/1422-0067/21/4/1236/pdf-vor |
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| article pdf uploaded. | 12 February 2020 16:57 CET | Version of Record | https://www.mdpi.com/1422-0067/21/4/1236/pdf-vor |
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