1.   Readers are referred to the earlier discussion.

2.   Readers are referred to the bibliography for further information.

3.   To gain a thorough understanding of the concepts presented, the reader is referred to the bibliography.

4.   Readers are referred to the bibliography for further sources of information on this subject.

5.   The reader is referred to other sources for a proper treatment of these matters.

6.   This is more complicated because one is now dealing with three dimensions, and the reader is again referred to other sources for the theory.

7.   The reader is referred to reports of this study.

8.   No more than headings are given below--for details, readers are referred to the forms themselves.

9.   And in one volume, the English notes twice refer the reader to the German notes for more complete information.