| article html file updated | 8 February 2020 01:36 CET | Update | https://www.mdpi.com/2218-273X/7/1/30 |
| article html file updated | 23 September 2019 20:32 CEST | Update | - |
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| article xml uploaded. | 16 March 2017 11:11 CET | Original file | https://www.mdpi.com/2218-273X/7/1/30/xml |
| article pdf uploaded. | 16 March 2017 11:11 CET | Version of Record | https://www.mdpi.com/2218-273X/7/1/30/pdf |
