Geodesic
Borromean Rings and Embedding Obstructions
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Solitons, geometry, and topology: on the crossroads, Tome 225 (1999), pp. 331-338

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This survey describes recent examples of incompleteness of the Van Kampen and the deleted product obstructions beyond the metastable case. The construction is an interesting example of the interplay between algebraic and geometric topology and one of its origins is the Borromean rings example. 
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     author = {D. Repov\v{s} and A. B. Skopenkov},
     title = {Borromean {Rings} and {Embedding} {Obstructions}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {331--338},
     publisher = {mathdoc},
     volume = {225},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1999_225_a21/}
}
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D. Repovš; A. B. Skopenkov. Borromean Rings and Embedding Obstructions. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Solitons, geometry, and topology: on the crossroads, Tome 225 (1999), pp. 331-338. http://geodesic.mathdoc.fr/item/TM_1999_225_a21/