Fix javadoc comment on SAFE_MIN/MAX
diff --git a/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java b/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java
index c390ccf..c9be094 100644
--- a/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java
+++ b/commons-numbers-complex/src/main/java/org/apache/commons/numbers/complex/Complex.java
@@ -87,12 +87,12 @@
private static final double B_CROSSOVER = 0.6471;
/**
* The safe maximum double value {@code x} to avoid loss of precision in asin/acos.
- * Equal to sqrt(M) / 8 in the Hull, et al with M the largest normalised floating-point value.
+ * Equal to sqrt(M) / 8 in Hull, et al (1997) with M the largest normalised floating-point value.
*/
private static final double SAFE_MAX = Math.sqrt(Double.MAX_VALUE) / 8;
/**
* The safe minimum double value {@code x} to avoid loss of precision/underflow in asin/acos.
- * Equal to sqrt(u) * 4 in the Hull, et al with u the smallest normalised floating-point value.
+ * Equal to sqrt(u) * 4 in Hull, et al (1997) with u the smallest normalised floating-point value.
*/
private static final double SAFE_MIN = Math.sqrt(Double.MIN_NORMAL) * 4;
/**
