| article html file updated | 9 February 2020 04:22 CET | Update | https://www.mdpi.com/2311-5629/4/1/8 |
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| article html file updated | 25 January 2018 16:52 CET | Original file | - |
| article xml uploaded. | 25 January 2018 16:51 CET | Update | https://www.mdpi.com/2311-5629/4/1/8/xml |
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| article pdf uploaded. | 25 January 2018 16:51 CET | Version of Record | https://www.mdpi.com/2311-5629/4/1/8/pdf |