| article html file updated | 9 February 2020 05:28 CET | Update | https://www.mdpi.com/2218-273X/8/1/7 |
| article html file updated | 30 September 2019 12:24 CEST | Update | - |
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| article xml uploaded. | 4 February 2018 03:08 CET | Update | https://www.mdpi.com/2218-273X/8/1/7/xml |
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| article pdf uploaded. | 4 February 2018 02:57 CET | Version of Record | https://www.mdpi.com/2218-273X/8/1/7/pdf |