Zeh V'zeh Gorem [Part 2 - Emulsifiers] (Bitul and B'lios #3 - Shulchan Aruch YD 87:11)
Rabbi Dovid Cohen
Zeh V'zeh Gorem [Part 2] Simultaneous or Consecutive? (sherry casks, blenders) Emulsifiers (definition, status as ma'amid, zeh v'zeh gorem) See seforim by Rabbi Cohen at www.kashrushalacha.com