"further attests" is a perfectly acceptable phrase in written English and is most often used in legal writing.
An example of its usage is: "The witness's testimony further attests to the validity of the contract."
But "Living Standards" further attests to Ms. Mulder's gift for natural phrasing and spontaneous emotional expression.
Increased elastic modulus and onset temperature of melting endotherm with the heat treatment compared to cold addition further attests the X-ray observations of enhanced structural ordering.
We also obtain a good recognition performance for user-defined gestures that further attests the ability of HBF49 to deal with a great variety of symbols.
The fact that despite all the recent tribunal decisions companies in the sector continue to deny workers paid holidays and the minimum wage further attests to the total impunity with which they have been allowed to act.
The ability to use biogenic hard tissues such as coral and nacre in augmentation of damaged bone tissue further attests to the unique bonds which are shared by hard tissues in nature.
This further attests to the difficulties in the management of mushroom poisoning.
Ratings by other users further attest to the usefulness of their contributions.
The different patterns of correlation further attest that the items tap different types of processing.
That point is further attested to by opinion polling in the province published by Queen's University Belfast in July.
They further attest that the arrest warrant should be rescinded because it cannot be implemented, owing to Assange's asylum in the Ecuadorean embassy.
Quality and ability of the faculty are further attested to by the amount of independent research grant support awarded to individual members.
