| article html file updated | 7 February 2020 19:44 CET | Update | https://www.mdpi.com/2075-163X/6/4/132 |
| article html file updated | 22 September 2019 12:11 CEST | Update | - |
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| article html file updated | 30 December 2016 06:14 CET | Update | - |
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| article xml uploaded. | 16 December 2016 10:15 CET | Original file | https://www.mdpi.com/2075-163X/6/4/132/xml |
| article pdf uploaded. | 16 December 2016 10:15 CET | Version of Record | https://www.mdpi.com/2075-163X/6/4/132/pdf |
