| article html file updated | 8 February 2020 02:01 CET | Update | https://www.mdpi.com/1996-1073/10/4/416 |
| article html file updated | 23 September 2019 23:06 CEST | Update | - |
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| article xml uploaded. | 23 March 2017 08:26 CET | Original file | https://www.mdpi.com/1996-1073/10/4/416/xml |
| article pdf uploaded. | 23 March 2017 08:26 CET | Version of Record | https://www.mdpi.com/1996-1073/10/4/416/pdf |
