Regarding ananda ramayana & battle between Lord rama and Hanumanji

[Yasoda Jivan dasa]

Namskarah

I have two questions to ask. 

1) There is a work known as ananda ramayana which is said to be a work of sage valmiki. Do any book or any acarya in our traditional indian culture have accepted or quoted this work? 

2) There is a popular story which narrates about battle between hanumanji and Lord ram chandra to protect the king kashiraja. Is there any reference for this?