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| article html file updated | 4 July 2018 11:21 CEST | Original file | N/A |
| article pdf uploaded. | 4 July 2018 11:20 CEST | Version of Record | https://www.mdpi.com/2309-608X/4/3/81/pdf |
| article xml uploaded. | 4 July 2018 11:20 CEST | Update | https://www.mdpi.com/2309-608X/4/3/81/xml |
| article xml file uploaded | 4 July 2018 11:20 CEST | Original file | N/A |
