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| article pdf uploaded. | 20 September 2018 13:09 CEST | Updated version of record | https://www.mdpi.com/2218-1997/4/9/92/pdf |
| article xml uploaded. | 20 September 2018 13:09 CEST | Update | https://www.mdpi.com/2218-1997/4/9/92/xml |
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| article html file updated | 28 August 2018 14:56 CEST | Original file | N/A |
| article pdf uploaded. | 28 August 2018 14:54 CEST | Version of Record | https://www.mdpi.com/2218-1997/4/9/92/pdf-vor |
| article xml uploaded. | 28 August 2018 14:54 CEST | Update | N/A |
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