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| article xml uploaded. | 30 August 2017 08:56 CEST | Original file | https://www.mdpi.com/1422-0067/18/9/1871/xml |
| article pdf uploaded. | 30 August 2017 08:56 CEST | Updated version of record | https://www.mdpi.com/1422-0067/18/9/1871/pdf |
| article pdf uploaded. | 29 August 2017 15:17 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/9/1871/pdf-vor |
