| article html file updated | 8 February 2020 00:36 CET | Update | https://www.mdpi.com/2220-9964/6/3/69 |
| article html file updated | 23 September 2019 14:47 CEST | Update | - |
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| article html file updated | 28 March 2017 11:04 CEST | Update | - |
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| article xml uploaded. | 2 March 2017 10:32 CET | Original file | https://www.mdpi.com/2220-9964/6/3/69/xml |
| article pdf uploaded. | 2 March 2017 10:32 CET | Version of Record | https://www.mdpi.com/2220-9964/6/3/69/pdf |
