| 1 | Macrocyclic Chemistry ; B. Dietrich , P. Viout , J.M. Lehn VCH ISBN 3-527-28330 -7 1993 |
| 2 | Synthetic Multidentate Mocrocyclic Coumpounds ; R.M. Izat , J.J. Christensen Academic Press , Inc. ISBN 0-12-377650-3 1978 8. Supramolecular Chemistry; J.M.Lehn; VCH;1995 ISBN 3-527-29311-6 |
| 3 | The Chemistry of Ethers , Crown Ethers , Hydroxyl Groups and Their Sulphur Analogues Part I , Saul Patai ISBN 0-471-27771-1 1980 John Willey of Sons Ltd. |