| article html file updated | 7 February 2020 21:22 CET | Update | https://www.mdpi.com/2076-3271/5/1/3 |
| article html file updated | 4 May 2019 15:31 CEST | Update | - |
| article html file updated | 13 January 2017 08:12 CET | Original file | - |
| article xml uploaded. | 13 January 2017 08:11 CET | Original file | https://www.mdpi.com/2076-3271/5/1/3/xml |
| article pdf uploaded. | 13 January 2017 08:11 CET | Version of Record | https://www.mdpi.com/2076-3271/5/1/3/pdf |
