| article html file updated | 26 September 2022 14:14 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/208 |
| article pdf uploaded. | 23 March 2018 09:21 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/208/pdf |
| article pdf uploaded. | 14 February 2018 07:01 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/208/pdf-vor |
