reference.autolabel list 0none 11,2,3... AA,B,C... aa,b,c... ii,ii,iii... II,II,III... reference.autolabel Specifies the labeling format for Reference titles I If non-zero, references will be numbered using the parameter value as the number format if the value matches one of the following: 1 or arabic Arabic numeration (1, 2, 3 ...). A or upperalpha Uppercase letter numeration (A, B, C ...). a or loweralpha Lowercase letter numeration (a, b, c ...). I or upperroman Uppercase roman numeration (I, II, III ...). i or lowerroman Lowercase roman letter numeration (i, ii, iii ...). Any non-zero value other than the above will generate the default number format (upperroman).