| article html file updated | 7 February 2020 04:36 CET | Update | https://www.mdpi.com/2076-3417/6/2/53 |
| article html file updated | 6 May 2019 00:16 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:48 CET | Original file | N/A |
| article pdf uploaded. | 16 February 2016 09:17 CET | Version of Record | https://www.mdpi.com/2076-3417/6/2/53/pdf |
| article xml uploaded. | 16 February 2016 09:17 CET | Original file | https://www.mdpi.com/2076-3417/6/2/53/xml |
