diff --git a/example/references/capacitor_time_curve.cpp b/example/references/capacitor_time_curve.cpp
index c604d6e5..844bf4d2 100644
--- a/example/references/capacitor_time_curve.cpp
+++ b/example/references/capacitor_time_curve.cpp
@@ -33,31 +33,34 @@
 int main()
 {
   using namespace units::isq;
-  using namespace units::isq::si::references;
+  using namespace units::isq::si::capacitance_references;
+  using namespace units::isq::si::voltage_references;
+  using namespace units::isq::si::resistance_references;
+  using namespace units::isq::si::time_references;
 
   std::cout << "mp-units capacitor time curve example...\n";
   std::cout.setf(std::ios_base::fixed, std::ios_base::floatfield);
   std::cout.precision(3);
 
-  constexpr auto c = 0.47 * uF;
-  constexpr auto v0 = 5.0 * V;
-  constexpr auto r = 4.7 * kR;
+  constexpr auto C = 0.47 * uF;
+  constexpr auto V0 = 5.0 * V;
+  constexpr auto RR = 4.7 * kR;  // cannot use just 'R' here
 
-  for (auto tt = 0 * ms; tt <= 50 * ms; ++tt) {
-    const Voltage auto vt = v0 * units::exp(-tt / (r * c));
+  for (auto t = 0 * ms; t <= 50 * ms; ++t) {
+    const Voltage auto Vt = V0 * units::exp(-t / (RR * C));
 
-    std::cout << "at " << tt << " voltage is ";
+    std::cout << "at " << t << " voltage is ";
 
-    if (vt >= 1 * V)
-      std::cout << vt;
-    else if (vt >= 1 * mV)
-      std::cout << quantity_cast<si::millivolt>(vt);
-    else if (vt >= 1 * uV)
-      std::cout << quantity_cast<si::microvolt>(vt);
-    else if (vt >= 1 * nV)
-      std::cout << quantity_cast<si::nanovolt>(vt);
+    if (Vt >= 1 * V)
+      std::cout << Vt;
+    else if (Vt >= 1 * mV)
+      std::cout << quantity_cast<si::millivolt>(Vt);
+    else if (Vt >= 1 * uV)
+      std::cout << quantity_cast<si::microvolt>(Vt);
+    else if (Vt >= 1 * nV)
+      std::cout << quantity_cast<si::nanovolt>(Vt);
     else
-      std::cout << quantity_cast<si::picovolt>(vt);
+      std::cout << quantity_cast<si::picovolt>(Vt);
     std::cout << "\n";
   }
 }