$1!Jc!8{!O(!X4!3o!:`!7t!Y=s - AmmannC. K.; SeiferleC. E.; PelloniG; $1!_#!KY!_Bs ($1!T+!4I!<Ds $1!V1![6!7t!CU!3K!JH!Nas, 1981)
$1!04!Tk!;C!Iqs