| article html file updated | 9 February 2020 13:53 CET | Update | https://www.mdpi.com/2075-4701/8/4/270 |
| article html file updated | 2 October 2019 15:22 CEST | Update | N/A |
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| article html file updated | 17 April 2019 03:46 CEST | Update | N/A |
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| article html file updated | 15 April 2018 10:04 CEST | Original file | N/A |
| article xml uploaded. | 15 April 2018 10:02 CEST | Update | https://www.mdpi.com/2075-4701/8/4/270/xml |
| article pdf uploaded. | 15 April 2018 10:02 CEST | Version of Record | https://www.mdpi.com/2075-4701/8/4/270/pdf |
