Genz, Alan. <br/><br/>
Computation of multivariate normal and t probabilities / 
Alan Genz, Frank Bretz. 
 - Dordrecht ;  New York :  Springer,  c2009. 
 - viii, 124 p. :  ill. ;  24 cm. 
 - Lecture notes on statistics,  195  0930-0325 ; .