+ * D.Day et al, "Study of \nud charged-current two-pion production in the threshold region", Physical Review D, Volume 28, Number 11, 1 December 1983 \n
+ * Derrick, Musgrave, Ammar, Day, Kafka and Mann, "Two- and three-pion productin by \nu\mud recations nears threshold: The implication for nucleon-decay experiments", Physical Review D, Vol 30, Number 7, 1 October 1984
+ * D.Day et al, "Study of \nud charged-current two-pion production in the threshold region", Physical Review D, Volume 28, Number 11, 1 December 1983 \n
+ * Derrick, Musgrave, Ammar, Day, Kafka and Mann, "Two- and three-pion productin by \nu\mud recations nears threshold: The implication for nucleon-decay experiments", Physical Review D, Vol 30, Number 7, 1 October 1984
+ * D.Day et al, "Study of \nud charged-current two-pion production in the threshold region", Physical Review D, Volume 28, Number 11, 1 December 1983 \n
+ * Derrick, Musgrave, Ammar, Day, Kafka and Mann, "Two- and three-pion productin by \nu\mud recations nears threshold: The implication for nucleon-decay experiments", Physical Review D, Vol 30, Number 7, 1 October 1984