Diophantine Approximation – W.M. Schmidt – Google Books

https://books.google.com/books?id=XqZtCQAAQBAJ&pg=PA95&lpg=PA95&dq=transference+dual+diophantine&source=bl&ots=tmRTE7ITIZ&sig=a3OlQuutKrman_04FAVIgFnuNE8&hl=en&sa=X&ved=0ahUKEwiavqCIv8_UAhWJ5IMKHXzoD3E4ChDoAQgLMAA#v=onepage&q=transference%20dual%20diophantine&f=false

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