| article html file updated | 9 February 2020 01:36 CET | Update | https://www.mdpi.com/2075-4701/8/1/20 |
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| article xml uploaded. | 31 December 2017 07:14 CET | Original file | https://www.mdpi.com/2075-4701/8/1/20/xml |
| article pdf uploaded. | 31 December 2017 07:14 CET | Version of Record | https://www.mdpi.com/2075-4701/8/1/20/pdf |
