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| article pdf uploaded. | 23 February 2018 12:31 CET | Updated version of record | https://www.mdpi.com/1422-0067/19/2/607/pdf |
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| article xml uploaded. | 23 February 2018 11:52 CET | Update | https://www.mdpi.com/1422-0067/19/2/607/xml |
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| article pdf uploaded. | 23 February 2018 11:52 CET | Updated version of record | https://www.mdpi.com/1422-0067/19/2/607/pdf-vor |
| article pdf uploaded. | 18 February 2018 11:44 CET | Version of Record | https://www.mdpi.com/1422-0067/19/2/607/pdf-vor |
