| article html file updated | 8 February 2020 03:24 CET | Update | https://www.mdpi.com/2076-2607/5/2/18 | 
| article html file updated | 24 September 2019 06:44 CEST | Update | - | 
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| article html file updated | 28 June 2017 14:08 CEST | Update | - | 
| article html file updated | 12 April 2017 11:21 CEST | Original file | - | 
| article xml uploaded. | 12 April 2017 11:20 CEST | Original file | https://www.mdpi.com/2076-2607/5/2/18/xml | 
| article pdf uploaded. | 12 April 2017 11:20 CEST | Version of Record | https://www.mdpi.com/2076-2607/5/2/18/pdf |