Jingfa Liu Yali Wang Jinji Pan Efficiently Packing Circles into a Larger Containing Circle. 250-256 2009 HPCA (China) http://dx.doi.org/10.1007/978-3-642-11842-5_34 conf/cnhpca/2009 db/conf/cnhpca/cnhpca2009.html#LiuWP09