| article html file updated | 9 February 2020 14:02 CET | Update | https://www.mdpi.com/2076-3921/7/4/59 |
| article html file updated | 2 October 2019 16:13 CEST | Update | - |
| article html file updated | 1 May 2019 03:04 CEST | Update | - |
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| article html file updated | 1 May 2018 10:23 CEST | Update | - |
| article html file updated | 16 April 2018 17:29 CEST | Original file | - |
| article xml uploaded. | 16 April 2018 17:28 CEST | Original file | https://www.mdpi.com/2076-3921/7/4/59/xml |
| article pdf uploaded. | 16 April 2018 17:28 CEST | Version of Record | https://www.mdpi.com/2076-3921/7/4/59/pdf |
