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| article xml uploaded. | 2 March 2017 04:32 CET | Original file | https://www.mdpi.com/1422-0067/18/3/503/xml |
| article pdf uploaded. | 2 March 2017 04:32 CET | Updated version of record | https://www.mdpi.com/1422-0067/18/3/503/pdf |
| article pdf uploaded. | 25 February 2017 10:54 CET | Version of Record | https://www.mdpi.com/1422-0067/18/3/503/pdf-vor |
