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Figure 6
Isogonal cubic links of three quadrangles. Top (knv) quadrangles linked by Whitehead links. Bottom Borromean rings in maximum-symmetry embeddings. Also shown are `Borromean twins' (six quadrangles).

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ISSN: 2053-2733
Volume 76| Part 5| September 2020| Pages 611-621
https://doi.org/10.1107/S2053273320010669
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