| article html file updated | 8 February 2020 21:34 CET | Update | https://www.mdpi.com/2076-3921/6/4/93 |
| article html file updated | 28 September 2019 13:53 CEST | Update | N/A |
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| article html file updated | 18 November 2017 11:08 CET | Original file | N/A |
| article xml uploaded. | 18 November 2017 11:07 CET | Original file | https://www.mdpi.com/2076-3921/6/4/93/xml |
| article pdf uploaded. | 18 November 2017 11:07 CET | Version of Record | https://www.mdpi.com/2076-3921/6/4/93/pdf |
