Found:

Accessibility

SYNTAX: in Chomsky's (1981) version of Binding Theory: a is accessible to i if and only if i is c-commanded by a and coindexing of a and i would not violate the i-within-i condition.
Also: condition on bound variable pronouns proposed in Higginbotham (1980) which accounts for weak crossover and strong crossover.

LIT.	Chomsky, N. (1981) Higginbotham, J. (1980)