TY - RPRT TI - Improved penicillin selective enzyme electrode. AU - L F Cullen AU - J F Rusling AU - A Schleifer AU - G J Papariello PY - 1974 DO - 10.1021/ac60349a007 UR - https://pubmed.ncbi.nlm.nih.gov/4413798/ ID - 4413798 ER -