Constraining dust properties in circumstellar envelopes of C-stars in the Magellanic Clouds: Optical constants and grain size of carbon dust. Issue Volume 14:Issue A30(2018) (August 2018) - Nanni, Ambra; Marigo, Paola; Groenewegen, Martin A. T.; Aringer, Bernhard; Rubele, Stefano; Bressan, Alessandro; Girardi, Léo; Pastorelli, Giada; Bladh, Sara