On WKMT website you can find the article written by me, analysing one in particular called The Period- eight measures long one type of theme and
contains two four-measure phrases called Antecedent and Consequent.
Juan Rezzuto, my colleague and founder of WKMT, launched recently his article series about Haydn sonatas. To be exact, a series of articles of how to analyse them properly. Which it could used also to analyse any other piano sonatas.