| article html file updated | 26 September 2022 12:18 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/236 |
| article pdf uploaded. | 23 March 2018 04:59 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/236/pdf |
| article pdf uploaded. | 13 February 2018 03:50 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/236/pdf-vor |
