@article{Sh:806, author = {Shelah, Saharon}, trueauthor = {Shelah, Saharon}, fromwhere = {IL}, journal = {Real Analysis Exchange}, note = { arxiv:math/0211438 }, pages = {477--480}, title = {{Martin's Axiom and Maximal Orthogonal Families}}, volume = {28}, year = {2002/03, no.2}, }