Geert Wets, Elke Hermans, Davy Janssens, Koen Vanhoof, Edith Donders, Qiong Bao, Yongjun Shen, Banghua Yang. An Excellent Guest Professor in Hasselt University. In Jie Lu, Etienne E. Kerre, editors, A Tribute to Prof. Dr. Da Ruan. pages 115-120, Springer, 2013. [doi]
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