Locating ( FKs ) References to a Primary Key

Hi to all, 

Is there any means by which one can get all Foreign Keys (References) that
'point' to a certain Primary Key for a given table ?

For instance, let's consider those three tables:

(NOTE: table contents here are not deeply thought of...)

// employees table
create table emp
(id serial primary key, 
first_name varchar not null, 
last_name varchar not null, 
.....................etc.);

// employee address
create table emp_address
(emp_id integer references emp (id), 
city integer references city (id), 
primary key (emp_id, city), 
comments varchar not null);

// employee categories ()
create table emp_categories
(emp_id integer references emp (id), 
institution integer references institutions (id),
unique (emp_id, institution), 
category integer references categories (id), 
primary key (emp_id, institution, category), 
description varchar not null);


So, can we issue a query that gets all references to emp.id ?
which should yield here:   emp_address.emp_id 
and emp_categories.emp_id


Thanks in advance, 
Roger Tannous.

    
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