| article html file updated | 9 February 2020 05:48 CET | Update | https://www.mdpi.com/2076-3417/8/2/250 | 
| article html file updated | 30 September 2019 14:27 CEST | Update | - | 
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| article html file updated | 7 February 2018 10:01 CET | Original file | - | 
| article xml uploaded. | 7 February 2018 09:59 CET | Update | https://www.mdpi.com/2076-3417/8/2/250/xml | 
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| article pdf uploaded. | 7 February 2018 09:59 CET | Version of Record | https://www.mdpi.com/2076-3417/8/2/250/pdf |