| article html file updated | 8 February 2020 01:51 CET | Update | https://www.mdpi.com/2304-8158/6/3/23 |
| article html file updated | 23 September 2019 22:06 CEST | Update | - |
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| article xml uploaded. | 21 March 2017 07:57 CET | Original file | https://www.mdpi.com/2304-8158/6/3/23/xml |
| article pdf uploaded. | 21 March 2017 07:57 CET | Version of Record | https://www.mdpi.com/2304-8158/6/3/23/pdf |
