| article html file updated | 26 September 2022 11:24 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/252 |
| article pdf uploaded. | 23 March 2018 04:42 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/252/pdf |
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| article pdf uploaded. | 12 February 2018 01:58 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/252/pdf-vor |
