| article html file updated | 14 December 2017 07:12 CET | Original file | https://www.mdpi.com/2409-515X/3/4/34 |
| article xml uploaded. | 14 December 2017 07:11 CET | Original file | https://www.mdpi.com/2409-515X/3/4/34/xml |
| article pdf uploaded. | 14 December 2017 07:11 CET | Version of Record | https://www.mdpi.com/2409-515X/3/4/34/pdf |
