[2018-08-11]. OCLC 231696742. (原始内容存档于2019-07-17). Singh, Priyanka. Metro footfall surges with e-rickshaw feeder service - Times of India. The Times of India
信使史基尼爾(Skirnir)去找侏儒幫忙製造出的最堅固的繩索,其鎖鏈的材料分別有: 貓的腳步聲 (The sound of a cat's footfall) 女人的鬍子 (The beard of a woman) 山的根 (The roots of a mountain) 熊的肌腱 (The sinews