| article html file updated | 7 February 2020 23:27 CET | Update | https://www.mdpi.com/2075-4701/7/2/57 |
| article html file updated | 23 September 2019 08:13 CEST | Update | - |
| article html file updated | 4 May 2019 11:09 CEST | Update | - |
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| article html file updated | 15 February 2017 11:24 CET | Update | - |
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| article xml uploaded. | 15 February 2017 11:22 CET | Original file | https://www.mdpi.com/2075-4701/7/2/57/xml |
| article pdf uploaded. | 15 February 2017 11:22 CET | Version of Record | https://www.mdpi.com/2075-4701/7/2/57/pdf |
