| article html file updated | 14 August 2026 13:56 CEST | Update | https://www.mdpi.com/1422-0067/18/4/868 |
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| article xml uploaded. | 21 April 2017 12:53 CEST | Update | https://www.mdpi.com/1422-0067/18/4/868/xml |
| article pdf uploaded. | 21 April 2017 12:53 CEST | Updated version of record | https://www.mdpi.com/1422-0067/18/4/868/pdf |
| article pdf uploaded. | 19 April 2017 15:04 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/868/pdf-vor |
