Michael O. Freeman

H2NC(O)OPO32− [1][永久失效連結] Nelson, David L. and Michael M. Cox. Lehninger Principles of Biochemistry fourth edition. W. H. Freeman and company New York. 

Elisabeth Freeman and Eric Freeman Head First Java (ISBN 0-596-00920-8) by Kathy Sierra and Bert Bates Head First 设计模式 (ISBN 0-596-00712-4) 作者 Eric Freeman, Elisabeth

Victor Deyglio – 副工程师 Robert Williams – 封面 Michael Hodgson – 艺术设计与指导 Robert John – 摄影 Jack Lue – 摄影 Greg Freeman – 摄影 Marc Canter – 摄影 Leonard McCardie –

{\overrightarrow {\leftarrow }}} −O2CC(O)CH2CO2H + H+ pKa = 2.22 −O2CC(O)CH2CO2H ← → {\displaystyle {\overrightarrow {\leftarrow }}} −O2CC(O)CH2CO2− + H+, pKa = 3

2nd ed. Blackwell Science Ltd, p.144 Robert L. Carroll (1988), Vertebrate Paleontology and Evolution, W.H. Freeman & Co. p.266 主龍形下綱：喙頭龍目、三稜龍目 Palaeos