| article html file updated | 7 February 2020 19:06 CET | Update | https://www.mdpi.com/2305-6320/3/4/30 |
| article html file updated | 4 May 2019 20:20 CEST | Update | - |
| article html file updated | 5 December 2016 11:08 CET | Original file | - |
| article xml uploaded. | 5 December 2016 11:06 CET | Original file | https://www.mdpi.com/2305-6320/3/4/30/xml |
| article pdf uploaded. | 5 December 2016 11:06 CET | Version of Record | https://www.mdpi.com/2305-6320/3/4/30/pdf |
