The perils of polynucleotides: The experimental gap between the design and assembly of unusual DNA structures. - Stephen C. Seeman; Hui Wang; Bing Liu; Jing Qi; Xiaojun Li; Xiaoping Yang; Furong Liu; Weiqiong Sun; Zhiyong Shen; Ruojie Sha; Chengde Mao; Yinli Wang; et al. (DNA Based Computers, 1996)