Francis Place acknowledged an intellectual debt to Frend.

It's not the quantity, but the significance of the intellectual debt that really matters.

Taken together it clearly gives the impression that Schimper has been suspiciously economic with acknowledgements of his great intellectual debts to Warming.

Yet apart from this acknowledged intellectual debt and critical reaction to Spengler Mosley developed other ideas from his work.

Milosz uses this late work to acknowledge a range of personal and intellectual debts.

In conveying the intellectual debt he owed him, Pasinetti writes:

The intellectual debt that Apple owes Xerox is almost universally acknowledged.

Moore himself freely acknowledges his intellectual debt to Hillman.

In his autobiography Kuznets acknowledges his "great intellectual debt to Mitchell."

He continually accused others of plagiarism, but rarely acknowledged his own intellectual debts.