TY - GEN AU - Vajk,O P AU - Mang,P K AU - Greven,M AU - Gehring,P M AU - Lynn,J W TI - Quantum impurities in the two-dimensional spin one-half Heisenberg antiferromagnet SN - 1095-9203 PY - 2002///0327 N1 - Publication Type: Journal Article UR - https://doi.org/10.1126/science.1067110 ER -