Reference for Eruvin 9:2
גַּג גָּדוֹל סָמוּךְ לְקָטָן, הַגָּדוֹל מֻתָּר וְהַקָּטָן אָסוּר. חָצֵר גְּדוֹלָה שֶׁנִּפְרְצָה לִקְטַנָּה, גְּדוֹלָה מֻתֶּרֶת, וּקְטַנָּה אֲסוּרָה, מִפְּנֵי שֶׁהִיא כְפִתְחָהּ שֶׁל גְּדוֹלָה. חָצֵר שֶׁנִּפְרְצָה לִרְשׁוּת הָרַבִּים, הַמַּכְנִיס מִתּוֹכָהּ לִרְשׁוּת הַיָּחִיד, אוֹ מֵרְשׁוּת הַיָּחִיד לְתוֹכָהּ, חַיָּב, דִּבְרֵי רַבִּי אֱלִיעֶזֶר. וַחֲכָמִים אוֹמְרִים, מִתּוֹכָהּ לִרְשׁוּת הָרַבִּים, אוֹ מֵרְשׁוּת הָרַבִּים לְתוֹכָהּ, פָּטוּר, מִפְּנֵי שֶׁהִיא כְּכַרְמְלִית:
A large roof adjoining a small one — the large is permitted [i.e., It is permitted to bring vessels to it from the house below, and those of the small roof do not forbid it, for vis-à-vis the large roof, the breach in the small roof is (perceived as) an entrance, and it (the large roof) is permitted by reason of the wings jutting out a little on either side as a railing around the roofs, and it is considered an enclosure. (This, when the breach is not larger than ten cubits.)], but the small is forbidden [i.e., It is forbidden to bring vessels to it from the house below, the men of the large roof forbidding it, for it (the small roof) is "breached onto it" entirely.] A large courtyard breached onto a small one — the large is permitted, [by reason of the wings remaining on either side, causing the breach to be perceived as an entrance], and the small is forbidden, [being entirely breached. This, only if it were breached before Shabbath, but if it were breached on Shabbath, even the small one is permitted. For since it was permitted for part of Shabbath, before it was breached, it is permitted for all of Shabbath.] A courtyard breached into the public domain [i.e., a courtyard whose wall facing the public domain fell entirely or (were breached) by more than ten cubits] — if one carries from it to a private domain or from a private domain to it, he is liable, [for it is like a public domain.] These are the words of R. Eliezer. The sages say: (If he carries) from it to the public domain or from the public domain to it, he is not liable, [but it is forbidden to do so], for it is [not a public domain, but] like a karmelith. [The halachah is in accordance with the sages.]