Man Leading Women and Woman Leading Women

Here is a blog post by IslamicSalvation, which can be found here:

الرجل يؤم النساء والمرأة تؤم النساء

Chapter on a man leading the women and a woman leading the women (in prayer)

جماعة، عن أحمد بن محمد، عن الحسين بن سعيد، عن فضالة، عن ابن سنان، عن سليمان بن خالد قال: سألت أبا عبدالله (عليه السلام) عن المرأة تؤم النساء، فقال: إذا كن جميعا أمتهن في النافلة فأما المكتوبة فلا ولا تقدمهن ولكن تقوم وسطا منهن (صحيح على الظاهر)

Jama’ah (a large number of my teachers) from Ahmad bin Muhammad from Husayn bin Said from Fadhala (bin Ayub) from Ibn Sinan from Sulayman bin Khalid who said : I asked Aba Abdillah (a.s) about a woman leading the other women in prayer, so He (a.s) said : If they are all women - she may lead them in the Nafila and as for the Maktuba (daily obligatory) then NO, and she does not stand in front of them but rather in the middle (in their midst). (Sahih Apparently)