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| article html file updated | 24 November 2018 11:54 CET | Original file | N/A |
| article pdf uploaded. | 24 November 2018 11:53 CET | Updated version of record | https://www.mdpi.com/2227-7099/6/4/61/pdf |
| article xml uploaded. | 24 November 2018 11:53 CET | Update | https://www.mdpi.com/2227-7099/6/4/61/xml |
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| article pdf uploaded. | 19 November 2018 15:37 CET | Updated version of record | https://www.mdpi.com/2227-7099/6/4/61/pdf-vor |
| article pdf uploaded. | 19 November 2018 15:36 CET | Version of Record | https://www.mdpi.com/2227-7099/6/4/61/pdf-vor |
| article xml file uploaded | 19 November 2018 15:36 CET | Original file | N/A |
