| article html file updated | 9 February 2020 12:38 CET | Update | https://www.mdpi.com/2304-8158/7/4/56 |
| article html file updated | 2 October 2019 07:30 CEST | Update | - |
| article html file updated | 1 May 2019 05:52 CEST | Update | - |
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| article html file updated | 1 May 2018 05:26 CEST | Update | - |
| article html file updated | 5 April 2018 09:05 CEST | Original file | - |
| article xml uploaded. | 5 April 2018 09:04 CEST | Original file | https://www.mdpi.com/2304-8158/7/4/56/xml |
| article pdf uploaded. | 5 April 2018 09:04 CEST | Version of Record | https://www.mdpi.com/2304-8158/7/4/56/pdf |
