There's going to a lot more of those references.
Afais, there was Dragon Ball, Doraemon and Medaka Box.
Kuroshitsuji, too (I guess so that
the girls everybody who enjoyed that series can have a "oh, I know this, too" moment).
I like how irreverently they play with tropes (boobs and brains ... nice!) and that the two main chars are women. So I'll keep watching it ^^