A1 [1, 2, 4].

A1 [1, 2, 3].

A [1, 2, 3].

In A2 [2 p. 17]

In A2 and A3 [2 p. 17, 3]

In A1 and more [1, 2 p. 17, 3]

B&B [1, 4].

Bibliography

[1]A. One. There, 2012.   
[2]A. Two. Here, 2012.    
[3]A. Three. Where?, 2013.
[4]B. Uno. Ici, 2012.