BBC - Parenting - Babies: Crying & Comforting
   Describes why babies cry, and what can be done to comfort them.
   http://www.bbc.co.uk/parenting/kids/babies_crying1.shtml

Baby Crying Excessively
   Guide for parents by a family doctor.
   http://www.medic8.com/healthguide/articles/babycryexcessive.html

Dealing with Crybabies
   Parental advice from an experienced parent.
   http://www.thelightkeeper.com/articles/cg/cgcrybaby.htm

Evaluation and Intervention in Excessive Crying in Infancy
   Overview presented by the Kansas Association for Infant Mental Health.
   http://www.kaimh.org/slides/excess/

FamilyFun: Calming a Crybaby
   Advice for parents whose toddler cries excessively.
   http://familyfun.go.com/parenting/child/dev/expert/dony18facrybaby/

MedlinePlus Medical Encyclopedia
   Information on causes of excessive crying in infants, advice and treatment.
   http://www.nlm.nih.gov/medlineplus/ency/article/003023.htm

The Effect of Excessive Crying on the Development of Emotion
   Study published in Infancy. [PDF]
   http://www.hhdev.psu.edu/ebp/stifter%20and%20spinrad%202002.pdf