| article html file updated | 9 February 2020 05:33 CET | Update | https://www.mdpi.com/2305-6304/6/1/12 |
| article html file updated | 30 September 2019 12:54 CEST | Update | - |
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| article xml uploaded. | 5 February 2018 12:45 CET | Update | https://www.mdpi.com/2305-6304/6/1/12/xml |
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| article pdf uploaded. | 5 February 2018 12:45 CET | Version of Record | https://www.mdpi.com/2305-6304/6/1/12/pdf |