| article html file updated | 8 February 2020 06:40 CET | Update | https://www.mdpi.com/2306-5354/4/2/52 |
| article html file updated | 25 September 2019 00:07 CEST | Update | - |
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| article html file updated | 28 June 2017 12:39 CEST | Update | - |
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| article xml uploaded. | 25 May 2017 09:27 CEST | Original file | https://www.mdpi.com/2306-5354/4/2/52/xml |
| article pdf uploaded. | 25 May 2017 09:27 CEST | Version of Record | https://www.mdpi.com/2306-5354/4/2/52/pdf |
