| article html file updated | 8 February 2020 19:55 CET | Update | https://www.mdpi.com/2075-4698/7/4/30 |
| article html file updated | 28 September 2019 03:14 CEST | Update | - |
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| article html file updated | 2 January 2018 14:11 CET | Update | - |
| article html file updated | 31 October 2017 11:08 CET | Original file | - |
| article xml uploaded. | 31 October 2017 11:07 CET | Original file | https://www.mdpi.com/2075-4698/7/4/30/xml |
| article pdf uploaded. | 31 October 2017 11:07 CET | Version of Record | https://www.mdpi.com/2075-4698/7/4/30/pdf |
