Unfortunately, that is the study by Mark Regnerus. The gay advocates had a hissy fit, and now the University of Texas is investigating Regnerus for misconduct with the study, and for receiving funds from anti-gay groups:
“U. of Texas Investigating Mark Regnerus for Scientific Misconduct Over Flawed, Anti-Gay Parenting ‘Study’”
This study is the most thorough and comprehensive study of it's kind. The facts counter the 'just a normal lifestyle' arguments of the past few decades.
It is actually a shame that we have to have a debate about how kids raised by their two biological parents have the best chance of survival.