@article {hakstian1977best,
	title = {Best univocal estimates of orthogonal common factors},
	journal = {Psychometrika},
	volume = {42},
	number = {4},
	year = {1977},
	pages = {627{\textendash}630},
	publisher = {Springer},
	author = {Hakstian, A Ralph and Zidek, James V and McDonald, Roderick P}
}
