| article html file updated | 9 February 2020 03:27 CET | Update | https://www.mdpi.com/2306-7381/5/1/6 |
| article html file updated | 2 May 2019 01:28 CEST | Update | - |
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| article html file updated | 28 March 2018 10:27 CEST | Update | - |
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| article xml uploaded. | 18 January 2018 05:23 CET | Original file | https://www.mdpi.com/2306-7381/5/1/6/xml |
| article pdf uploaded. | 18 January 2018 05:23 CET | Version of Record | https://www.mdpi.com/2306-7381/5/1/6/pdf |
