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To my teacher and advisor, Maurice Heins, on his 70th birthday.
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© 1987 Springer-Verlag
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Lewis, J.L. (1987). Approximations of sobolev functions and related topics. In: Berenstein, C.A. (eds) Complex Analysis I. Lecture Notes in Mathematics, vol 1275. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0078355
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DOI: https://doi.org/10.1007/BFb0078355
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