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| article xml uploaded. | 20 March 2017 09:51 CET | Original file | https://www.mdpi.com/1422-0067/18/3/657/xml |
| article pdf uploaded. | 20 March 2017 09:51 CET | Updated version of record | https://www.mdpi.com/1422-0067/18/3/657/pdf |
| article pdf uploaded. | 17 March 2017 12:12 CET | Version of Record | https://www.mdpi.com/1422-0067/18/3/657/pdf-vor |