matrix of all permutations of ⍳⍵[Hui 2016a, §19; McDonnell 2003; Hui 2015b]. …… perm ⍵ obtains by indexing each row of the matrix ⍒⍤1 ∘.=⍨ ⍳⍵ by 0,1+perm ⍵-1
[2008-04-10]. (原始内容存档于2020-05-11). Worms Frozen for 42,000 Years in Siberian Permafrost Wriggle to Life (页面存档备份,存于互联网档案馆), Live Science 4.2万年冰冻线虫竟起死回生:人体冷冻术何时能成