| article html file updated | 7 February 2020 01:49 CET | Update | https://www.mdpi.com/2076-3417/5/4/1639 |
| article html file updated | 6 May 2019 05:50 CEST | Update | N/A |
| article html file updated | 26 March 2019 15:49 CET | Original file | N/A |
| article pdf uploaded. | 4 December 2015 11:24 CET | Version of Record | https://www.mdpi.com/2076-3417/5/4/1639/pdf |
| article xml uploaded. | 4 December 2015 11:24 CET | Original file | https://www.mdpi.com/2076-3417/5/4/1639/xml |
