| article html file updated | 7 February 2020 14:50 CET | Update | https://www.mdpi.com/2227-9032/4/3/68 |
| article html file updated | 5 May 2019 04:21 CEST | Update | - |
| article html file updated | 29 September 2016 12:14 CEST | Update | - |
| article html file updated | 12 September 2016 08:42 CEST | Original file | - |
| article xml uploaded. | 12 September 2016 08:40 CEST | Update | https://www.mdpi.com/2227-9032/4/3/68/xml |
| article xml uploaded. | 12 September 2016 08:40 CEST | Original file | - |
| article pdf uploaded. | 12 September 2016 08:40 CEST | Version of Record | https://www.mdpi.com/2227-9032/4/3/68/pdf |
