Amazon.com: D'Addario EXP17 Coated Phosphor Bronze Acoustic Guitar Strings, Light, 13-56 – Offers a Warm, Bright and Well-Balanced Acoustic Tone and 4x Longer Life - With NY Steel for Strength and Pitch
Coated Vs. Uncoated Strings: Which One To Choose? - Guitar Unit
Cleartone Strings - premium coated guitar strings
Coated vs. Uncoated Guitar Strings: What are the differences? – Ernie Ball Blog
D'Addario EXP NY Steele Coated Phosphor Bronze Acoustic Guitar Strings — Eastside Home