| article html file updated | 8 February 2020 02:02 CET | Update | https://www.mdpi.com/1996-1073/10/4/417 |
| article html file updated | 23 September 2019 23:10 CEST | Update | - |
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| article html file updated | 23 March 2017 10:21 CET | Original file | - |
| article xml uploaded. | 23 March 2017 10:19 CET | Original file | https://www.mdpi.com/1996-1073/10/4/417/xml |
| article pdf uploaded. | 23 March 2017 10:19 CET | Version of Record | https://www.mdpi.com/1996-1073/10/4/417/pdf |
