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Note: The Mathematical Intelligencer accepts no responsibility should any reader (or editor) of this article be immobilized – Marjorie Senechal.
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Conway, J., Heuer, B. All Solutions to the Immobilizer Problem. Math Intelligencer 36, 78–86 (2014). https://doi.org/10.1007/s00283-014-9503-z
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DOI: https://doi.org/10.1007/s00283-014-9503-z