| article html file updated | 8 February 2020 08:32 CET | Update | https://www.mdpi.com/2218-1997/3/2/51 |
| article html file updated | 25 September 2019 09:44 CEST | Update | - |
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| article html file updated | 30 June 2017 09:16 CEST | Update | - |
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| article xml uploaded. | 16 June 2017 15:31 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/51/xml |
| article pdf uploaded. | 16 June 2017 15:31 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/51/pdf |
