Title: On the lattice of [pi]°1 classes
Description: <a href="http://uf.catalog.fcla.edu/uf.jsp?st=UF002761788&ix=pm&I=0&V=D&pm=1" rel="nofollow">http://uf.catalog.fcla.edu/uf.jsp?st=UF002761788&ix=pm&I=0&V=D&pm=1</a>