| article html file updated | 9 February 2020 11:28 CET | Update | https://www.mdpi.com/2075-5309/8/4/51 |
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| article xml uploaded. | 18 April 2018 03:30 CEST | Update | https://www.mdpi.com/2075-5309/8/4/51/xml |
| article pdf uploaded. | 18 April 2018 03:30 CEST | Updated version of record | https://www.mdpi.com/2075-5309/8/4/51/pdf |
| article html file updated | 17 April 2018 14:09 CEST | Update | - |
| article pdf uploaded. | 17 April 2018 14:07 CEST | Updated version of record | https://www.mdpi.com/2075-5309/8/4/51/pdf-vor |
| article html file updated | 17 April 2018 02:37 CEST | Update | - |
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| article html file updated | 27 March 2018 16:57 CEST | Original file | - |
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