How many works of Robert Silverberg's were based on Asimov's stories?

Question

It's well known that Silverberg wrote novels based on some of Asimov's stories. For example, [The Child of Time](https://www.amazon.com/Child-Time-Isaac-Asimov/dp/0330325795) was based off of [The Ugly Little Boy](https://en.wikipedia.org/wiki/The_Ugly_Little_Boy), and [Nightfall](https://en.wikipedia.org/wiki/Nightfall_(Asimov_novelette_and_novel)) was based off the Asimov story of the same name.How many other (if any) novels/books/other works did Silverberg base off of Asimov stories?

Answer 1

Yes, Silverberg based his works, 'Nightfall' and 'The Ugly Little Boy' on Asimov's short stories of same titles. There is a third work by Silverberg, 'The Positronic Man' based on another of Asimov's short story, 'Bicentennial Man' written in 1976. In total, I believe Silverberg based three of his works on three of Asimov's.

I hope this answer is helpful.