| article html file updated | 8 February 2020 04:16 CET | Update | https://www.mdpi.com/2218-1997/3/2/37 |
| article html file updated | 4 May 2019 00:57 CEST | Update | - |
| article html file updated | 30 June 2017 09:15 CEST | Update | - |
| article html file updated | 24 April 2017 12:45 CEST | Original file | - |
| article xml uploaded. | 24 April 2017 12:44 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/37/xml |
| article pdf uploaded. | 24 April 2017 12:44 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/37/pdf |
