Both players arrived on deadline day.
Nolan said: "Getting the big lad in and Yossi has given everyone a huge lift.
"Andy's a great lad. I get on well with him and when I knew he was coming down I was excited and chuffed. We are so lucky to get him. I told him he has nothing to prove to anyone. He is a top striker.
"I was confident at the beginning of the campaign. I knew pre-season we would get new players in and I am delighted with the quality."