| article html file updated | 8 February 2020 16:11 CET | Update | https://www.mdpi.com/2223-7747/6/3/39 |
| article html file updated | 27 September 2019 03:28 CEST | Update | - |
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| article html file updated | 30 September 2017 14:26 CEST | Update | - |
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| article xml uploaded. | 14 September 2017 12:29 CEST | Original file | https://www.mdpi.com/2223-7747/6/3/39/xml |
| article pdf uploaded. | 14 September 2017 12:29 CEST | Version of Record | https://www.mdpi.com/2223-7747/6/3/39/pdf |
