Pieter Hintjens - The Psychopath Code - Cracking the Predators That Stalk Us

http://listverse.com/2013/03/19/10-baffling-wives-of-serial-killers/

https://en.wikipedia.org/wiki/Tsavo_Man-Eaters

https://www.fbi.gov/stats-services/publications/serial-murder

https://en.wikipedia.org/wiki/Charles_Whitman

https://en.wikipedia.org/wiki/Survivorship_bias

https://en.wikipedia.org/wiki/Domestic_violence#Under-reporting

https://en.wikipedia.org/wiki/Domestic_violence#Forms

http://medicalxpress.com/news/2012-09-million-people-commit-suicide-year.html

http://www.ncbi.nlm.nih.gov/pubmed/12584064

http://rfc.zeromq.org/spec:42

http://www.ncbi.nlm.nih.gov/pubmed/23884812

http://www.opposingviews.com/i/health/mental-health/study-psychopaths-can-turn-empathy-and-switch

https://en.wikipedia.org/wiki/Munchausen_syndrome

http://www.researchgate.net/publication/258845871_The_Relationship_Between_Psychopathy_and_Olfactory_Tasks_Sensitive_to_Orbitofrontal_Cortex_Function_in_a_Non-criminal_Student_Sample

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3166523/

http://www.toddkshackelford.com/downloads/Shackelford-Larsen-JPSP-1997.pdf

https://en.wikipedia.org/wiki/Sadness#Pupil_empathy

http://www.forbes.com/sites/work-in-progress/2014/01/20/8-common-causes-of-workplace-demotivation/

https://www.med.uvm.edu/ahec/downloads/School_Nurse_GrandroundsJan10.pdf

https://en.wikipedia.org/wiki/Evolution_of_emotion

http://greatergood.berkeley.edu/article/item/hope_on_the_battlefield

http://www.latimes.com/nation/la-na-veteran-suicide-20150115-story.html

http://psychopathsandlove.com/a-hidden-fact-of-psychopaths-they-have-no-gender/

https://en.wikipedia.org/wiki/Happiness

http://www.today.com/health/take-our-survey-how-successful-your-marriage-t40166

https://www.youtube.com/watch?v=pWq8j0yXkMI#t=273

http://www.wikihow.com/Gain-Control-of-Your-Emotions

http://www.wikihow.com/Watch-Wildlife

http://isabellenazare-aga.com/

http://www.ncbi.nlm.nih.gov/pubmed/15160786

http://www.biomedcentral.com/1471-244X/10/33