Piano quartets with a second violin are no piano quartets, but piano quintets. There is an other important part of this site dedicated to this more popular combination: string quartet with piano. Here some other combinations of piano quartet with another stringplayer:
- Stephen Paulus(1949), "Exotic Studies"(2000): with solo viola (2000); See: www.pytheasmusic.org
- Laura Karpman, "Portrait of Jaco: a fantasy based on themes of Jaco Pa, with second cello; See: http://library.newmusicusa.org/library/composition.aspx?CompositionID=77646